Welcome Alex.

I am not going to advise on which bike (too much). There others here a lot smarter than me. You will find lots of different riding styles here, and I think sometimes that influences opinions.

From my 3 year experience of getting back into riding, i can tell you that a few things now stick out to me like a sore thumb.

1. Don't buy from Xmart.

2. If you get a Mountain Bike, that is great. A lot of riders use Mtn bikes as commuters. But if you do, get one either with a rigid fork, or a lock-out. Suspension forks rob clydes of a lot of energy that could otherwise be used for riding and enjoying.

3. Bigger wheels are good. That is not to say that a 26" is not going to work, but I rode 26 for two year and made the switch to 29 this year and I am never going back.

4. This will probably not be your last bike.

Have Fun. That is the most important thing. Ride the style that suits you the best.

Good to have you here.

Jay