I'm a visual learner and a spreadsheet nut; here are some tools I've built for myself that you might useful:
Jimbles' General Envoy Guide
The envoy's a cool class, but if you're new to Starfinder you might have a hard time parsing all the options and abilities. Writing guides is hardly my forte, but you might find this helpful nonetheless.
Jimbles' Starfinder Equipment Master List
Starfinder has so much stuff, and it's a double-edged sword. On one hand, you have a huge amount of tools on hand at any level, but on the other, you need to find them first. This spreadsheet contains all Starfinder equipment in an easy to sort and filter format. It's great for quickly kitting out characters and building loot piles.
Jimbles' Starfinder Feat Tree
Starfinder doesn't have as many feats as Pathfinder, but you still need to spend time slogging through a list of feats you can't or won't take before you find that perfect one. This tree is designed to make it easier by organizing feats by purpose and prerequisite, allowing you to find what you're looking for faster.
(The feat tree above covers only the Core Rulebook. Looking for those sweet splatbook options options? The whole shabang is right here.)