Thinking about trying out some individual stocks versus index funds. Posted this to r/personalfinance but didn’t get much feedback

What should I do with extra savings?

39 yrs old, I’ve got 147K sitting in a HYSA with Citibank currently at 3.6%. I have a profit share retirement plan at work and a Roth IRA that I max out annually. My only debt is my mortgage and I owe around 35% of my current appraised value with an interest rate of 2.8%.

I know I’ve got to get more of that invested. I guess I can just put it in index funds for long-term gains, but I like to try my hand at some short-term gains. I’m thinking about putting 10 K to start with into tech split between Google Microsoft Nvidia and meta

Is this a stupid idea? I know this sub isn’t for individual stock advice. But I’d like to see where I stand on my thought process in general