Not a dumb question. A financial planner is not necessary.
Easiest option is if your employer has a 401K with employer match and put everything in a target retirement age fund. Based on your post in the Job Seeker thread, it sounds like you don't want to be there any more and it isn't good for you, so take that off the table for now. But when you get a better job, this is the easiest and best because you get the employer match (free money), tax deduction (contributions are deducted from what you are taxed on), and it's easy to set up (automatically deducted from your paycheck).
Second option is to set up an IRA. If you bank with a large, national bank (such as Bank of America, Chase, Wells Fargo, etc.) they will have an investment arm where you can set one up for free. If your bank doesn't offer one, it's easy to set one up with one of those big banks. Easiest is a Roth IRA - you can't deduct what you invest, but when you retire the proceeds are tax-free. If you want the tax deduction now, set up a traditional IRA. For a traditional IRA, you can deduct all you put in if you don't have a 401K at work; if you do have a 401K at work, you can't deduct if you make more than $80K/year. In that case, go with a Roth IRA.
As far as what to invest in, put the first $10K in a S&P 500 fund. In fact, put most if not all of it in a S&P 500 fund until you learn more about investing. Vanguard S&P 500 Fund (ticker symbol VOO) is one of the best. If I could go back and do it over again, I'd put 80% of my investments into a S&P 500 fund. No need to try to hit home runs.