Good afternoon.
I would like advice about repotting cactus and succulents.
I have read numerous websites,threads and forums the past few days.I'm a bit confused.
I'm afraid I will make a mistake when I'm bringing them back in.

I trust the information and expertise on here so that's why I'm here.
I started gardening in March of this year so I haven't gone through a winter with the plants yet.

All the succulents are outside. I am going to bring them back in for the winter. Now some of these are still in the medium they came in and others have been repotted in cactus mix with perlite.
They seem to be doing great.

Also can I put any of them in the same pot? I am going to post pics. All of thessucculents except the jade are my 8year old sons so I have to help him 're pot.

Last question, how do I make sure I'm not bringing in any bugs, pest, aphids etc. inside with them.