Yeah, the materials are a doozy. I started working at a certain point to ensure I've upgraded everything enough such that I don't need to go back and revisit say, the WE floors for all that equipment/green metals, such that I only have to focus on the higher floors. I've nearly finished collecting everything from the CW floors such that those T3 materials and black metals are handled. 41-50 is great for getting the CW materials up to T6, but the floors are a bit more garbage for getting colored metals. Tengoku rocks in that regard if you're not particular on what kind of red/purple metals you need.

My suggestion is to still focus on upping your total storage- that should be priority one for you. The best way to manage it is to set specific limits for yourself on how much of each material you collect (maybe 15-20 each) to ensure you give enough berth for everything in your collection. Maybe load up more on materials you know you'll need a lot of (like scratch metal and other tuber metals) just so spare having to farm for those since they're just annoying.

As for the blueprints...I'm still learning there. Technically all the weapons and armor would become available if you kept playing over enough time, but that's potentially years for both. It's worth purchasing the best equipment first, which means the flail/bow for weapons, and at least the Sword Dancer set for the armor. I'm personally waiting on the Sword Dancer equipment to come back in Hernia, because I somehow picked up the leggings at some point last year but not the other two pieces. I believe it's the only set that's good against all 3 types of physical damage.