Well done! Yes, it gets better, yes slow down.
Clothes-wise, I've built up over the years, so I wear Sweaty Betty leggings (only in the sales), as they don't move, no hoiking up the waistband as you exercise, Sweaty Betty stamina sports bras as they work for my small boobs. Tops are a variety of vests, which I then layer with a long sleeved running top when it gets a bit cooler. I also sometimes wear a sweatshirt.
An ear warmer band is a must for me, otherwise my ears get really, REALLY painful in the cold weather, and I have a pair of running gloves for proper cold days (although I don't really like wearing them). A pretend flip belt from Amazon to keep my phone, keys, tissues and gloves when they've annoyed me enough.
I've actually started investing in some proper running socks as well, my feet are a bit of a nightmare with toenails with a tendency to ingrow and a burgeoning bunion on one foot, so the extra cushioning of a running sock helps take away a smidgeon of the discomfort. My favourites are Stance. And last, but the most important thing of all, trainers. I've had gait analysis, physio advice on trainers due to knee issues, and they've all ended up pointing to a shoe for over-probation with a good level of cushioning. For me that's Asics Gel Kayano, which aren't cheap, but I buy previous seasons' shoes in the outlet or online.