Suppose these were my stats:
Rank: 155
Battles: 10807
Player Kills: 294
Deaths: 218
Non-player Kills: 245
Planets found: 166
Planets occupied: 38
Planets conquered: 12
Missions completed: 393
Scans performed: 263
Successful hacks: 485
Successful raids: 158
Size Class: Heavy Dreadnaught
Attack: 818
Defense: 825
Hull: 1670
What would you advise me to do and why?
Should I set goals to get somewhere, would some legion be specially designed for me, could there be a better way for me to spend my energy... just some side questions that may help direct getting a helpful answer.
Note: these are not my current stats, but they were some time ago.

You'll probably be requested to provide your status on each branch of the research tree as well.

Update your stats, add what your current attack defence and hull is at and especially what you have researched and how far into the chain you've researched everything. That way you can be helped a lot more.

PvP before it gets hard, get the Mk3 Dominion Cannons.

D Cannons closely followed by Proteans. The best friends a captain could ever have.