Get yourself an IM media basket and ditch the filter sock. Run filter floss and a bag of chime pure blue nano in the back chamber
I would replace the stock return pump with a controllable jebao off amazon
For heater, I’d go with a Helio 100w or as a budget option a hitop off amazon
Lighting, I’d look at and XR15, Kessils 360x or AI prime, in each case, with a mount. You can get a good deal on one of these on here
Depending on whether you upgrade the return pump, you may not need a power head but you can’t go wrong with a Nero 3 or if you’re on a budget, a hygger mini off Amazon
Throw in 10 lbs of special grade live sand. Try to source some live rock locally from a fellow hobbyist or you can go with dry rock