Welcome back! If you're grinding credits, exploration and in particular exobio is IMO the best way to make credits. I have made approx 20bil since November by just joining an expedition through edsm. But you can do it on yourself with mostly any ship and an Artemis suit. also don't forget an srv and preferably a repaid module as well as repair limpets controller. you can make the actual limpets by synthesizing them when you need tjem

Check out Ironheart Corporation. Played with those guys for a long time, great group and they've always got something going on.

https://discord.com/invite/R5v3zBqy