Beginning Tips

This is all new to me and a little overwhelming. I was looking for an app I can use to get into investing, and this one seems to be one of the best based on online reviews. However it does appear quite more complex than some of the other ones I looked at. I will be investing very small amounts, $10 to $15 every couple weeks, but I would be thankful for any tips or ideas that could make that successful on this platform.