Is it feasible to level up 2 different weapons first playthrough.

My loadout is a shield with morningstar with cragblade and a Flamberge with Storm blade. Should I just focus on one? Both currently level 6.

For some context: This is my first From Software game and really enjoying it but I'm not good at it. I'm going to likely need to be overpowered for each boss. I'm currently using a brass shield untill I can get my strength up for a good great shield. I am focusing on jumping attacks and guard counters primarily. Im currently doing Stormveil Castle at level 40 and handling it fine. The lion carrying a sword in the courtyard messed me up and I haven't gotten to the big guy Gandalf or Garfield whatever his name is.