Do realize that this is a puddly stage. Go on using diapers for naps, nights and trips. During this stage it is a good idea to introduce the child to the toilet as well as the potty. He will probably like the idea of peeing where you do, but he will need a firm stool or box to help him climb on and off, and a small seat clipped over the large one so that he does not feel that he is going to fall in. Be tactful about flushing the toilet.
Many children hate the noise and are frightened of the idea of things being sucked away.
They have so little idea of the relative sizes of things that they may actually think that they might be flushed away too. So let your child pull the handle himself if he enjoys doing so. If not, leave it until he is out of the bathroom. He can have them on for naps if he prefers and he should still wear them at night, but that is all. Although you will still a get a fair number of pools, giving up diapers is important.