Brave new world of sweaters. Shoulder Question

I’m about to venture into this brave new world of Baby sweaters. I’ve found a pattern that uses yarn from my stash and it looks quite easy.
My question is about the shoulders, the sleeves are just sewed onto this sweater with backstitch, although the pattern says you can use something different.
The picture on the pattern looks as though someone has stapled the sleeves on and threaded some yarn through to make it look sewn.

Can anyone recommend a prettier but not too difficult method of sewing on the sleeves, for someone who is not at all good at seaming?