Get out, explore a bit, see what the universe has to offer... Try visiting a few systems, get a feel for their economies, what they sell, what they want, the missions they have, their allegiances. Scan every unexplored system you jump into. Pay attention to systems with more than one station - sometimes they have different economies and you can pick up some moolah running commodities intra-system and doing missions too. Upgrade your power distributor, your power plant, first. Then build up some money for better FSD and the galaxy will be your oyster.
If you fancy some pew-pew, head for nav beacons. It'll probably be an eye opener and a steep learning curve initially, but if you just have a stock ship - meh. Free go around. Enjoy!
The thing is if you have never played any of the past iterations of this game, it all feels a bit daunting and a bit whut? huh? but stick with it and tootle around with the mindset that you're learning as you go and there are no goals to achieve. You're out in the big black and there's a lot of stuff to do - in the beginning (us beta backers are a bit bored, by and large!) You just can't do it all yet.
I'm a Frontier and First Encounters vet so I'm fine with just jumping around everywhere until I find the sweet spot. Think I found it at the mo - CD-58 16 is a good region to be in, I'm an Imperial dog.
And, welcome Commander!