I’d think you would find a group easily, they’d be happy to have someone willing to heal.
I don’t find druids a bad healer at all, from what I played on a private server anyway. I healed DM and blackfathom deep and was fine spam lower rank healing spells and save your higest rank for oh s**t situations.
At early dungeons you will be okay, but don’t expect to be invited as healer in LBRS, UBRS, BRD, Scholo and Strath. Wipes are guaranted in those dungeons and resto druid healing declines a little bit when they are close to 60.
I am currently leveling a druid. I healed Deadmines at level 18. As long as the party (mainly the tank) knows what they are doing you will do fine. I have yet to invest a point into the Restoration tree (all my points went into Feral).
The no res is one of the downsides but you will get invites, especially if you know what you are doing. Remember to down-rank your spells, else you will go oom immediately.
You will have no trouble healing as feral even. Just don’t spam highest ranking heals becasue of mana managment. Rezzing is a problem, but if everyone is doing what they are supposed to, noone will die (or maybe 1-2 deaths per run).
It’d like to add that in general it’s not as bad as some (the ones complaining will be usually lazy/inflexible) make it seem:
If it’s a wipe, you all run anyway. If they don’t, they’re usually the ones who should be swapped out.
If someone dies but it’s not a wipe chances are you are clearing trash. You can keep doing so while the person arrives.
If it’s almost a wipe you still have to eat/drink after an intense battle. If people start running back as soon as they die, by the time the survivors are ready there’s a good chance the first one to die is almost there to keep going.
There’s sometimes a priest, paladin or shaman in the party. Unless they’re the ones dying, you’d be ok in those cases.
If you like healing and you do it well people will keep calling you even if you’re not spec’ed for it. And even those who don’t understand the benefits of a druid will generally go “oh well, this’ll have to do”
Some of the advice you received here is insufficient, so here are some amendments:
You said you’re used to healing on retail, so the biggest thing to be aware of is that mana is much more of an issue and the pace of the game is completely different. You received the advice to downrank spells, but this can actually be really bad advice. Downranking is extremely strong in Classic if you have the gear to support it. Until you have good amounts of +healing on your gear, lower ranks of heals are not just less mana efficient, but consistently casting them keeps you from regenerating more mana. Since you’re asking about healing before Lv60, it’s better to not make assumptions about that you’d have the best gear at all times.
The better way to deal with mana without this kind of gear is to use the highest ranks of spells(in most situations), and heal in “bursts”, as well as avoid overhealing. Let’s say you’re in a dungeon and only the tank is taking damage. Let’s say your Healing Touch heals for 400 HP. You can precast it and keep interrupting it until you see that the tank will be missing 400 HP by the time your cast finishes. Let the HT hit and throw on a Rejuvenation to make sure the tank doesn’t lose health too quickly in the coming seconds, because now you wait for your regeneration. It only kicks in five seconds after you last spent mana, so you need to be able to not cast anything for a while. If someone else was missing a bit of health, you would have tossed them a heal as well before waiting for your renegeration. But as soon as people are topped up, you want to chill out and let that blue bar go up for as long as you’re comfortable with. Basically, in Retail, you want to keep people topped up all the time and it’s a matter of reactions to circumstances, but in Classic, the pace is much slower and the intended challenge was more about mana management(which to a big degree was broken by downranking once gear bonuses kicked in).
Until you can break the game with gear, the most important pieces of advices are to avoid overhealing(really surprised none said this) and don’t cast non-stop when you don’t need to, so you get a chance to regain some mana. You can also ask the group to use more CC or something else to help you out, if you find yourself struggling. Another thing to keep in mind is that you’re not limited to leather gear; if you find cloth items that surpass your leather items for healing in dungeons while leveling, you should of course keep and use them for that.