Hi there.
I'm a fairly new quad flyer also. Just got it this weekend and I have put about 3 hours of flight time (5 batteries).
Here's what I did & personal experience.
First of all I'd say watch lots of youtube, especially the mavic drone crash footage to see where they went wrong, one thing I've noticed is that they crash into a lot of things flying side ways.
No drone certification is required if you're flying as a hobbyist or for recreation, but you do have to register your mavic with the FAA ($5).
Wind: Personal experience, I would not fly anything more then 15mph & gust beyond 25mph, but that's just me, in P mode, with 15mph steady and 25mph gust the drone was having a hard time making head way and had to decrease altitude to get any where.
You can go into Sport mode to get more power but I'm not comfortable doing that just yet since I'm flying fairly close to the tree line.
Indoor: Never tried it, if you do, remember the return to home altitude setting
![Stick Out Tongue :p :p](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f61b.png)
The drone can produce 4k Video/images so I don't see why you can't use it for professional purpose but that requires a cert. from the FAA, Part 107 but I haven't done that since I don't intend to make money off of my hobby.