How to increase speed with time?

Hi, I want to make a parkour game and wanted to know how I could use blueprints to make my character go faster as time goes on, as though they were running. I am new to UE4, Thanks

In the character movement settings there is an option called acceleration. Mess with the numbers a bit. I did this for a “speed boost” item and it worked out well.

Where can I find that? Sorry complete beginner