I’d stick with 193 and see how it goes. Honestly, I don’t think the difference between 193 and 204 would be that meaningful in terms of the training effect you’ll be getting. If after a few workouts you want to nudge up the intensity a bit, it’s easy to do. Since you were at 300 a year ago, my guess is that you’ll have a significant jump at your next test after a few weeks of training.
I wouldn’t worry about an indoor/outdoor FTP either unless you were doing a lot of outdoor training (not riding/racing/group rides) and you did a proper test outdoors and there was a big difference between your numbers.