I went thru mediation with my ex-husband and we agreed the terms of our divorce through it.
Topics included split of assets (house, pensions etc) and residence and access of the children, as well as the type of divorce (clean break in our case)
It’s (much) cheaper than going thru solicitors and you get to negotiate with each other, rather than a random judge deciding what happens next. We started off with fairly straightforward topics and worked up to the hardest one (50/50 custody in our case
My advice would be don’t be nervous, but do know what you want and what you’re prepared to accept before you go.
Good luck