You need life support gel and ion battery for life support system and hazard protection system, respectively. Gather enough ingredients for those items, such as carbon, di-hydrogen, cobalt, etc. If you managed to get your starship flyable, get out of the planet into space. You'll pick up unknown signal and get to the signal source. There you will get the blueprint for base computer. Maybe the following guide will be of help:

https://nomanssky.fandom.com/wiki/Beginner%27s_guide