I'd be interested to know from some of his more right wing critics on here what he could do. Certainly things I can think of which would turn my opinion on him.
I'm probably the wrong one to ask because I'm very unlikely to vote Labour and even less so for Starmer who I don't trust and don't like - sneering sniveling little scrote and still remember how he said the word Coventry that irritated me more than it should, anyway I digress...
What he could and should do, and what all leaders should do is quite simple. There is no great science, most of us want the same things and it's about how they are achieved, so I think we simply need to see some progress. Off the top of my head a few thoughts:
Fund the NHS properly and get more nurses
Bring back some order, recruit more police and dont have them wasting their time on silly laws that don't allow common sense
Low interest rates, low taxes, plenty of jobs
Fill the pot holes on the roads,
Give us a clean, reliable on time train service where we can get a seat without taking out a mortgage
Build more houses and get people off the streets
Deal with drug dealers and get the vermin off our streets for good
Find a way of controlling immigration and despite the boats only being a small percentage, stop those and keep the noise down
Make sure we have options for people on low or disability income where they don't need to rely on foodbanks, but don't give free passes to those who are able to play the system and take take take without contributing to society
Be honest, if you can't deliver it, say why and what you propose to change rather than lying and then achieving nothing
None of that is groundbreaking, I doubt may would disagree with the sentiment of the above (although I'm sure a few will want to pick some holes in it), but the point is, we need to see some progress to a few of those type things because that's (imo) a few off the top of my head things the public want to see.
Note I've not mentioned big finance, international trade, nuclear or defence spend, education or any other big topics that are also important, but no government in my lifetime has actually tried to progress some of the basic needs of the electorate. If they get on top of those, then they can be looking at the big stuff in the background that the average Joe doesn't need to be burdened with.