That's similar to me. I usually pick one from the banner to play on first playthrough. On all games, even harem, I always do a solo path first (except your fuckfest games), while I get feel for the game and the girls. Here, I decided on Heidi, but sometimes switch, before first major decision depending on girl's personality and behavior. I didn't, I loved Heidi. After that I go back through and do the other solos of girls I like, throuples, harems or whatever is available. And set up all the paths I want to play out. I know lots of people do their manwhore first, but I do a solo.