Level 25 allows you to push your professions to 225 but it does not provide all the resources to do so.
If you want silk cloth you will be in 1K needles a lot farming Grimtotem and Galak centaurs. Also, did you know one variant of those centaurs can drop a custom BoE blue sword?
https://www.wowhead.com/classic/npc=4099/galak-marauder
Also good/only safe-ish spot for Iron and some Mithril (with few spawn points in Charred Vale where SoCal lady killer hunts…)
And if you want level ~25 greens and some blues you will need a group to farm level > 25 elite dwarves in Hillsbrad. They are friendly to Alliance though, so have fun on a PvP realm. They do drop some custom and good greens though:
https://www.wowhead.com/classic/item=4724/humberts-helm
And if you want mats, leather, or cloth for 225-ish crafting and enchants there is only one source at level 25 - THE ONE AND ONLY - Fishing.
Or more precisely fishing lootboxes:
https://www.wowhead.com/classic/search?q=trunk
Level 25 fishing in level 40+ zones 
some spots are safe but they are too slow to respawn under competition. And don’t forget Fishing Extravaganza.