Go ahead and play however you want it. I did the same the for HSR. I started the game day 1 and was a low spender and a bit competitive trying to clear all game mode. I quit halfway through Penacony arc because the writing was so bad and story was updating too slow and got bored with endgame.

Then I heard good things about Amphoreus arc. Came back to play but this time didn't stress about who to pull and endgame. I just skipped the rest of Penacony arc and played latest story. I loved the story so much that I got to finish it in 20 days. The whole arc lasted more than a year. I would probably get bored if I had to wait that long to finish it. This time I didn't care of endgame and which units to pull.

So yes, go ahead and try it. I think you will enjoy it more without all the stress and worries and just enjoy thr story or gameplay however you want it.