Am i still missing something?

Im on my first playtrough rn an have a fully upgraded seamoth, and unupgraded prawn duit snd cyclops. I am planning to check out the alien facilities bit im wondering if im still missing a part of progression in terms of tools or story.

I've visited 2 degasi bases (1 on the floating island and 1 in the jellie cave), have a ultra high capacity tank, afaik all tools (including stasis rifle, thermoblade, propulsion cannon ect. ) idk if i should get more upgrades or where to even find blueprints. Any help is appreciated bc idk if im ready. Btw idrc about minor spoilers regarding areas or small plot points