What software should I use to communicate with and train remote employees?

What problems are you having with coordination right now, and what have you already tried?

Have you surveyed your team to see what ways they would most like to keep in the loop/receive training?

I've used a lot of tools, but I have a hard time recommending things for this without knowing more about what specific gaps you need to fill.

We recently started using a SaaS app called Koan to track team progress on individual and organizational OKRs and I like it quite a bit - others would probably be fine doing a similar thing in a spreadsheet.

We also have some training in our learning management system (videos, quizzes) for self-learning.

I've seen some teams really enjoying Miro (not for me), and some using some of the "video game" style remote presence tools.

Ultimately I think you should workshop this w/ your team and find out what they feel they have been missing / need addressed.