Advice About Legal Name Change & Gender Status

I am looking for legal advice and support regarding name and gender status changes in Lake County (Clermont). If you do not support this, it will cost you nothing to simply ignore this post. To be clear: I am asking on behalf of someone else and your comments will not be seen by this person either way.

There is a lot of information online regarding name changes, gender status changes, and I also know that combining these requests would be ideal for our situation. Cost is a concern as we will be saving up for this.

If anyone knows anything, I basically want to know:
-at what point (if ever) to consult a lawyer
-if it is a good idea for this person to fill out the paperwork by themselves (with help from me but obviously I’m not a professional) or again, if we should have legal assistance with that
-what kind of financial preparation should we be taking? I cannot get a clear answer online regarding cost of name change, gender status, or both
-anything else we might need to know that most people do not consider or plan for?

Thank you to all who can help us on our path. If you are familiar with any online resources, we would love to hear about that as well!