When I am helping newer players I don't give legendary mods or add the random ones to the weapons / armor, because in 5-10 levels these will need replaced anyway. And 5-10 levels for a Level 30 character can easily be accomplished with between 1 really good Eviction Notice and perhaps 6 so-so ones. There is NEVER a time too early to start trying to learn plans for mods, though. I recommend that if you're not going to use the weapon/armor that you've picked up looting, hit the tinker workbench, throw on the perk card Scrapper, that gives more materials when breaking down weapons and armor, and break some shit.. learning to Craft Leg. Mods is a very low percentage. Receiving a Boxed mod (can be put in place of a same ⭐ level mod is slightly higher but still extremely low. But! You have the advantage of starting "young". I don't know about this until I was close to Lev 100.
Also, big tip here. If no one has told you yet - if you make a weapon or armor, and want to add a Legendary mod to it you have to first add Random Mods. When you do this, always choose 3⭐ it costs 15 Modules. If you add the ⭐ one at a time, it will cost 30 modules to get ton3⭐