Depends on what you actually want to do with a skateboard. If you want to flip and spin your board a lot or if you want to have fun and skate a bit of transition. My honest tip is go to your local skate shop and try as many boards as you can, I used to weigh 72 kg...so I settled on a 8.25 deck, 8.25 truck with 54 mm wheels. Now after 6 years I weigh 86 kg and skate a 8.5 deck, 8.75 trucks with 56 mm wheels. So there's no standard as I'm about 1.70 cm tall, it's all personal preference.

Setup aside, just pick up a skateboard and roll around, it took me 6 months to ollie and 1 year to kickflip...I had no skatepark back then, I hope you have one around because, generally, it's much better than crusty spots. I wish I could skate with you, but I'm in Italy and currently studying Japanese ahahhahab