Yep, mistakes will be made no matter how long you've been at it. My first year I used jiffy seed starting mix, and let them stay in there way too long. Didn't realize there were no nutrients in that mix so I stunted them quite a bit to start off, lol.
The last couple years I've been germinating the seeds using the paper towel/ziploc method, then moving them into the medium once they pop. I've started seeds in the normal mix I use for potting soil (1/3 coir, 1/3 perlite, 1/3 compost) which went fine. This year I'll start them in ziplocs, then move them to 50/50 mix of coir and perlite, and begin feeding them nutes once the first set of true leaves appears. Probably start at 1/8 strength nutrients and move up from there. No real reason for doing this, just want to experiment.
If you plan on growing a lot of plants, you may want to look into buying 1020 trays. It's dramatically easier to bottom water everything at once rather than each double-cup individually.
Good luck, and if you have any questions let me know :)
Get a couple 10x20 trays, some hemp mats, a led strip grow light, some hydroponic nutrients, some seeds, and you're good to go.
They are 10x20 trays used for microgreens. There is no drain. These plants sit in water all day. The pots are 4.75" square so I can fit 8 in each tray. I mix up nutrients and top up the blue hanging bags and they slowly drain into the trays. No pumps needed this way.
Okay my last idea, modifying seed started trays: https://www.amazon.com/Plant-Growing-Trays-Drain-Holes/dp/B0058PTK6M/ref=sr_1_8?crid=9XYTXOXCRMSV&keywords=seed+starter+tray&qid=1647965165&sprefix=seed+%2Caps%2C89&sr=8-8
cut off oneside, command strips to ceiling.
I use growing trays similar to these that I bought ages ago to start seedlings in back when I had a vegetable garden. Make sure to get ones without drain holes.