New Apple Tree - pruning advice

Good morning,

I planted a Kidd's Orange Red apple tree in January this year - and after a couple of scares with bad cuts - it survived and is now sending out some nice strong shoots. Growth has really picked up in the last week or so.

im asking for advice because I've read conflicting guides online

I'm uncertain as to whether I should at this point be selecting the shoots I want to use for my first tier - 'rubbing out' the ones lower down so the top buds get more nutrients.

you can see that I've got a couple strong shoots at the right hand side, one smaller one but is starting to grow at the left, and a top shoot that I'll be using as the leader.

or whether as some guides suggest - I should wait til August to summer prune the ones I don't want to a few leaves from the cluster.

any help much appreciated