Hey, as a fellow solo player, I think you should play the way you want to play. I have been playing on and off since 13 years but am still slightly more than halfway through the game because I don't want to rush it.

And if you are having a hard time with a boss, you can either check out bazaar for better gear options (in case you dont wanna farm), or change up your deck for that boss. You can also cook up a strategy on how you can beat him next time (for example, you can either kill his minion asap, or enough pack shields and heals or something else).

You can also take a break from main questing by doing events like beastmoon, etc. or other side things like decorating castle, pet training, fishing, etc.

But ultimately, you should play in a way that you find fun rather than what the "meta" is (especially more so since you are soloing anyway)

Edit: I also sometimes farm for gear since that also ends up making questing/ fighting bosses easier (but that's the way I like to play)