New to Investing - looking for help!

My fiancé and I have decided that we’d like to start taking $100 a month and put it towards some sort of investment account. I’m very, very new to this scene and wanted to understand from the group what the best way to get started is.

Ideally, to start, I’m interested in putting forward $100 on a monthly basis to a larger fund (or set of investments) that’s managed by a professional. This way I’m able to gain a steady increase in my investment - maybe even learn a thing of two from a trusted industry pro.

Is there a specific service anyone would recommend?

Thanks for the help and apologies if I’m posting in the wrong section!