China,
IMHO, you are putting the cart before the horse. Your BK discharge is the opportunity to get on the right path to financial independence. If you are trying to make money doing something you don't know about (Tax Liens) you will fail. That will put you in an even worse situation than you are in now.
First things first. Get your financial house in order. I would suggest reading "Set for Life" By Scott Trench, and "Rich Dad, Poor Dad" by Robert T. Kiyosaki, plus a bunch of other books. If you have kids, your obligation is to make sure that you have at least 6 months (or more) of expenses in the bank that you don't touch. This advice applies to EVERYONE!
8K liquid is probably not enough to meet the 6 month test, I would guess it's 2-3 months of expenses. Probably 15-20K is better. Ideally, if you are thinking of being an agent full time, then 12 months is better.
While you are working on that, you can begin to look at investing. I would be looking at 4 family properties to buy, and either stay in your existing house, or rent it and move into the 4 family and renovate. Learn how to do this by educating yourself, here on BiggerPockets, and with books. Most of the books that will teach you how to do this are free online (b-ok.org, openlibrary.org and others). I have found most of the books suggested in lists online as PDF's or you can borrow from your local library as ebooks online (ask them how to do this).
One more thing, (stepping onto soapbox):
You don't say how old your kids are, but put them to work helping you if they are old enough. Maybe they can wash dishes, vacuum, or clean the house. If they are old enough, have them help you in the real estate end. Children should be low-cost, tax deduct-able labor. Putting (teaching ) them to work (age appropriate, time appropriate), teaching them to be financially responsible, and teaching them to be independent of you are three of the most important things you can do as a parent. These are things they won't get taught in school, ever.
FWIW, you have a choice: Fight the battles now on helping/working/independence/decision making etc. or they will mooch off of you for the rest of your life. Hold their feet to the fire. It's easiest when they are young, harder when they are older. They will hate you until they turn 30, but the parent job description doesn't include "Friend to offspring" and "offspring must like parent at all times". In my line of work as a teacher, I see this all the time. Kids running parents, when it should be the other way 'round. 'Bout time we changed that order. Yes, I agree it's hard, it sucks, it's hearbreaking to have your offspring "hating" you for being a parent. What is more heartbreaking is the masses of people who don't have a future because nobody taught them how to be responsible as adults. Don't let your kids join those ranks. (stepping down off soapbox)
So, to recap:
1) Find some work that brings you a repeatable, consistent salary. Starting in RE full time is a tough way to do that. I would try to get a full time job, and then side hustle in real estate (put kids to work in side hustle).
2) Save 50% of that salary, until you have 6-12 months of reserves in the bank. Don't take on any more debt until you have this.
3) While you are working on #1 & #2, read, learn, educate yourself (finance and real estate), involve your kids, and create a plan.
Once you have 1 & 2 & 3 completed (this should ideally take less than a year), you will now have the following:
1) A chunk of change in the bank (say 24K+),
2) Education on how to be financially responsible,
3) Education (knowledge) on what type of real estate you want to invest in,
4) The ability to sleep at night knowing you can pay your bills if the SHTF.
and most importantly:
5) A plan. (that you seriously lack now)
Probably not what you wanted to hear, but I think most necessary to say.
Hope this helps!
Good Luck,
Jim