Yes, progress thru the main story. If there is a side event, I recommend doing that as there are often some good gear and drops in there. Cerise upon release kind of sucks, some people are finding usages for her for PVP stuff. I wouldn't put any resources towards Cerise right now.
Normally my thoughts are that your main goals at the beginning are to clear abyss and wyvern 11. Abyss gets you some good early gear along with some extra rolls. For Abyss, getting a Kiris leveled up is good because she can clear many things due to how poison works. F. Kluri (specialty changed version of Kluri). Wyvern 11 is to farm gear/gold. For that, you can do a team where Angelica tanks, montmorancy heals, alexa for DPS, and taranor guard for def break. If you have a Lena, I recommend building her because she's regarded as one of the best farmers in the game.
Normally my thoughts are that your main goals at the beginning are to clear abyss and wyvern 11. Abyss gets you some good early gear along with some extra rolls. For Abyss, getting a Kiris leveled up is good because she can clear many things due to how poison works. F. Kluri (specialty changed version of Kluri). Wyvern 11 is to farm gear/gold. For that, you can do a team where Angelica tanks, montmorancy heals, alexa for DPS, and taranor guard for def break. If you have a Lena, I recommend building her because she's regarded as one of the best farmers in the game.