^^^ Yes, yes, yes!

I advise you to start w/ FR and not 6-max. One reason is that the variance is higher on 6-max tables. Partly because (and this is huge) when 1 or 2 people sit out or leave, the table goes to 5-max and 4-max right away. The blinds are coming around to hit you much more frequently and your tight play will cost you more than it makes you. These are spots where you must know how to play post-flop because you have to get in there and fight for the blinds with marginal holdings. There is just a bigger skillset required, so save it for later. Focus on 1 thing at a time.

Right now, the discipline to fold ATo from early position is enough. The discipline to not get upset when the flop comes TTA is even more important. This is a source of tilt. Take every hand that goes to showdown and make notes on how every player played that hand. Use these as spots to ask yourself questions like: Could player A have bet more/less to achieve a better result? Could player B have folded there?

You'll get plenty of practice in marginal situations when you are checking your option on the BB. This is the time to learn about playing random hands OOP (You will quickly learn that even a hand as good as bottom 2 pair is tough to play OOP.)