I've been playing around with the idea for a new character, but I'm curious whether I'm going to run into un-foreseen problems at later levels. The idea is to take a Variant Human Fighter and pick up the Feat Magic Initiate at first level to get access to Shillelagh.

I'm going to dump both Str and Dex and pump up my Wis and make attacks with that. The idea will be to fight with a heavy stick. I'll pick up the Battlemaster Archetype, which has enough maneauvers that don't require a saving throw to be worthwhile.

The basic background is that the character is a soldier who got nearly killed and is basically physically crippled, but was rescued and trained as a Druid with an Elven teacher. He'll be druid-like flavorwise, but with an emphasis still on melee combat, using his understanding of and bond with nature to pull him through where his body couldn't.

The only things I've found that are going to hold back this character are that he'll be too weak to wear his armor, at least unless I'm able to pick up Mithril armor and that his Battlemaster saves depend on his dumped abilities, but there's enough of them that I can just not pick the ones that have a saving throw.

I wasn't planning to Multiclass anyway, but I won't be allowed to with these stats even if I wanted to, so that's not an option. This needs to be a pure Fighter.

However, while I'm pretty sure this'll be fine at the first few levels, I'm curious if I'll run into trouble at later levels when playing him. It'd suck to realize that at some level, the idea suddenly doesn't work anymore and I can't advance any further.

Is there any reason why this low-str, low-dex Fighter would be impossible to play at a certain level?