If you’re going to continue commuting? I’d upgrade the wheels for something lighter.
You’d instantly feel the difference in acceleration and climbing if you got something lighter.
Replacing the groupset wouldn’t make much difference unless you wanted to gear down, ie fitting a compact/semi compact chainset.
Also 9speed chain/cassettes are cheaper to replace and if you’re commuting this will be regularly (dependant on miles).
If you’re going to continue commuting? I’d upgrade the wheels for something lighter.
You’d instantly feel the difference in acceleration and climbing if you got something lighter.
Replacing the groupset wouldn’t make much difference unless you wanted to gear down, ie fitting a compact/semi compact chainset.
Also 9speed chain/cassettes are cheaper to replace and if you’re commuting this will be regularly (dependant on miles).