Absolutely everything. The modern world allows you to work from anywhere in the world, you do not necessarily need a computer, you can and from the phone. In many ways, it is the availability of the betting sphere that is so attractive.
2) Which site to bet on?
I only bet on Melbet.com, they have consistently the highest coefficients (you will earn more from each bet), there is no commission on input and withdrawal, and most importantly, they do not block the money of players who play in plus.
I lost a few million rubles because of what I bet on Winline and 1Win, these guys just froze my bills after big wins, so don't repeat my mistakes.