How can I get legal custody of my adult sister that suffers from MS?

You have to file for a Conservatorship. Here’s a link to instructions: https://www.courts.ca.gov/selfhelp-conservatorship.htm

My ex won't return my son until I "get help for my mental state (I cried twice in front of him) & kick boyfriend out of my life-

Unmarried mothers are only the custodial parent by default if there are no court orders. If you have court orders, and the custodial times are...

How do I stipulate a divorce prior to the divorce hearing?

You can complete, sign, and file a Stipulation and Order re Modification of Custody; here’s the link: https://www.courts.ca.gov/documents/fl355.pdf

Will an attorney in a custody case use their personal cell phone to call the opposing parent?

Why is your mom - instead of you -calling her back?

How will drop off/pick-ups work if the court approves a (far) move-away petition?

Generally, both parties are expected to drive (and probably meet in the middle) regardless of which one requested the move.

My spouse has taken me off all financial accounts after my spouse was found cheating.

You still have your cp interest in 1/2 funds acquired as cp; however, all income earned after date of separation is separate property of the...

Can you choose how long you want a restraining order to be served for if you are the plaintiff?

You cannot choose - but you can request a certain length of time.

You are under no obligation to engage in co-parenting therapy with the other party unless it is ordered by the court. There are special...

If the case is complete - with Notice of Entry of Judgment - you don't really need old attorney to sign a Substitution of Attorney; you do however...

It also depends on whether there are existing orders and whether there has been any substantial change since they were issued.