No, it is not a good idea. The work FA is trying to sell you a high fee managed account. You don't want that. Because you don't understand why you don't want that right now, I would suggest reading the JL Collins series and William Bernstein's "If you can."
Just because your parents did not invest, that does not mean you can't learn how to do it and be successful at it. A couple of generations ago, very few individuals invested in stocks and bonds. Somewhere along the way, people learned how to do it. Since you are smart enough to be an IT project manager and to figure out the math of installing floors, you can do it, too. It helps to make friends with people that are financially responsible and invest regularly. They are people with whom you can discuss saving and investing intelligently.
In your shoes, I would start small. You can open an IRA with Schwab for as little as $1,000. You can buy their index funds in increments as small as $1.00. An IRA is a good place to start. You may be able to reduce current taxes with a traditional IRA, if you don't make too much money to qualify. Or, you can open a Roth with after tax income and it grows tax free with no tax on the withdrawals. You have until the tax deadline in April to fund last year's IRA. How much of the $5,500 maximum can you come up with by then? Then start funding the 2018 IRA. If you can fund both, you could have $11,000 invested for retirement.
I would be a bit concerned about the cash cushion. A few thousand in the bank at a decent interest rate will insulate you against having to use credit cards to cover unexpected expenses. Credit cards are great for earning rewards, but alligators if you pay interest on them.
The goal is for you to be in charge of your money, and to manage it in your best interest. If you make the right choices, that will happen.