Acorn is it good for investing in am I bugging

I first got Acrons by doing a solid and clicking a link.

I notice that I need some passive income and I though why not the stock market. I have a job and everything so I'm mostly wondering if it's a good idea or should I got to the stock market directly like is common on the site.

Also while I'm here might aswell

Hey! Acorns makes it easy to save and invest. Join me and you'll get a free $5 investment! As a perk of referring users, I can get a reward too. Learn more and see terms here. https://share.acorns.com/thunderousflames?advocate.partner_share_id=1918555594

An extra 5 dollars is 5 dollars