Another newbie chiming in!
Jumps 1-16 were either on a 210 loaded at .59 or a 190 loaded at .68. I quite enjoyed the 15 minute long canopy rides, though I'm sure my AFF instructors were somewhat annoyed with having to wait around for an extra 10+minutes for me to finally land.
Jump 17 I started jumping my own gear - a Pulse 150. I was fully intending/expecting to wait to jump my 150 after jumping a friend's 170 for a bit (the DZ's rental 170s were too big for me) - I even had the 170 in my possession when I went to manifest and they brought my freshly packed and inspected rig down. Both of the riggers - one of whom was also my instructor, the other the DZ manager - were baffled that I was going to jump the 170. He had me hop on the scale with the gear on, made a bit of a funny face, then handed me a weight belt (I'd been using one since Cat C) and just kind of shook his head. They did say I didn't have to jump the 150 is I wasn't comfortable, but fuck it, the rig felt so perfect on I just had to.
The first couple of jumps were sans weight belt (loaded at .8) then slowly added lead until I was loading it at about .85. In a stroke of excellent timing, jumps 18-23 were a canopy course and made me feel so much more comfortable with my canopy. However, as the heat and humidity picked up I started to struggle with the Pulse. It was just too much glide for me and that's without even catching a thermal and just... Gliding forever. Front riser input was virtually impossible without flaring nearly all the way.
Jump 76 I downsized to a triathlon 135 loaded at .95 and it has been an absolute game changer for me. I feel as though I'm actually a part of the parachute, not just dangling beneath it while it mulls over whether or not it wants heed the input I give it. Of course it's also nice that I can land exactly where I want to, am able to get on my front risers, and just generally feel like I'm actually the one in control now. I am very happy on the 135 and don't plan on downsizing again anytime soon.
In no way am I advocating a 40sqft downsize at 17 jumps. Or another downsize under 100 jumps. YMMV. Talk to your riggers and instructors and heed their advice. The small person struggle is real.