Hi Polly.
This is my kinda music 60s-70s sounding classic rock .....You sing pretty good and have a tight band....so perhaps you are doing yourself down...I do see room for improvement.....but it certainly does not suck.

Perhaps a key change might help you reach the "ground" bit easier....also a little bit more light and shade in the vocals. Listen to the lead guitar ther is plenty light and shade variation going on. You need to emulate this. If you give 100% volume and effort all through the song you have nowhere left to go to when you really need the extra oomph. When you miss hitting high notes or sound iffy it means you are out of control. Less is sometimes more.

Too much fx on your voice for my liking but that is all down to taste.