I would say don't feel that intimidated by top player moving their cursors around like that. They've had months to years of building up to the point of playing at that kind of insane level. Same for even 3* or 4* players that might look like they're moving at light-speed to a newbie. Take inspiration to think you can be at that level, but don't be discouraged by it, nor feel like you have to play like that too, or should, just because you saw them play. If you put in the time and dedication, you can get there, but you need that time first, not just out of the gate.
As for song recs, if you're absolutely new to standard I would just start at anyting 1* or lower. There's nothing to "recommend" at this stage because there's not enough to really differentiate them. If you find that those maps aren't as bad as you thought, then bump up the SR by .3 or .4* to 1.3-1.4*, and so on until you find a rating level that is actually difficult (not just that you think it's hard from whatever preconceived notion, but you're actually having trouble when you try). Whatever that SR is would likely be what's just outside your comfort zone, and dipping down .1 or .2* would likely be where you'd be most comfortable. Use your comfort zone to warm up, then dip outside that to improve your skills.