Congrats to you for taking your finances seriously during such a big change in your life. It wont be easy since I am 100% certain that you will face quite a few curveballs as the divorce is finalized. So don't fret if the financial plan you are setting now isn't exactly what it looks like in a year. You are off to a great start and that is most of the battle.
Income 5,000 this includes $1645 in child support/spousal support
If the spousal support ends before child support or steps down over time, begin planning for ways to deal with the reduction. We get child support for our oldest son and began a savings plan three years before the support will end. The plan is to save 20% year 1, 40% year 2, and 60% in the last year. After the support ends, we have forced ourselves to be comfortable spending just 40% in the last year and the amount we saved allows us to pull out that same 40% for three years. Its a forced way to extend the support for a few years albeit at a lower level.
Groceries: $800 I have 3 teen and myself
Gas Car two$ cards teen and self: $250
Clothing $100
Kids activities $300
Restaurant eating out $200
Entertainment $200
Groceries - teenage kids are a grocery budgets worst nightmare. They will test your resolve here monthly. Definitely read up on the forum posts here on frugal cooking. There are so many great posts on how you can not only save a ton by planning meals but also eat healthier overall. Rice, beans, oatmeal, etc can really stretch your dollar and can be worked into even complainypants teen meals when done in a creative way.
Gas, Clothing, Activities - its a hard reality on teens that they are part of the divorce and things will change for them. Most parents work to ignore this or avoid it. You can tackle it head on with the kids by discussing openly how it affects your budget and that you need everyone to come together as a team to help. The kids can help by being aware of how all of their little asks really add up and the older kids can contribute more over time to these categories. I think it is very important to position this as a team effort to squeeze as much fun and enjoyment out of the money you have and not how you can cut back and live within a tight budget. Your phrasing and attitude about it will be key.
Full time job: I work for the city of of San Diego - I invest 15% of my income in retirement. I have a nice gov. pension
Research additional employer options for retirement. Many government jobs have multiple options and you want to know about all of them so that you can rank them and being contributing to them in a certain order as you invest more over the years. Now many government employers don't make it so easy to find and learn about options so after some online searching of their site, I would recommend calling their payroll/finance department and asking alot of questions.
I have an active Real estate license and the San Diego market is good..
Excellent side hustle opportunity. Don't let your license lapse while you are working out all of the divorce details.
Ex-covers health insurance and car insurance for now
For now....may be a big concern in the future. Consider how you can extend this as long as possible. For the health insurance, you can cover your children up to age 26. This may seem excessive but it may be a better deal for all involved and with multiple kids it is fairly likely that one will be a slow starter and require some extra years of support (consider turning them onto this forum when they are mature enough to understand it).