I am semi-retired so have plenty of time, as my fairly frequent posting here testifies.
I have four accounts, none of them big with three brokerages, so that gives me trades from $5 to $29 depending on volume of shares. And I do have order depth to 5 cents deep.
So I presume that I may have some advantages that many here may not have, but that should not hold anyone back from gambling with a small portion of their hold.

I generally gamble with 10 to 20% in any one stock that I hold, by that I mean if I hold 10,000 shares I will readily day trade 1000 and in near ridiculous situations 2000.
$5 trades from one broker allow me to dabble cheaply with 500 share oreders. Another, $10 for up to 1000 shares etc.
Risk often means reward too.

If any novice needs further details or advice, PM me. I am no expert therefore free, lol.
Cheers.