I have had to stop my Dutch course for the past 3 months . I would like to restart now. What should I do?
If you can still use the same login information to log into your Duolingo account, your Dutch course should still be there. Probably a lot of your previously learned skills will have lost strength or "decayed," so you should start out refreshing those (or entirely re-do some of the lessons) before starting new lessons in your Dutch course. Here's also link with general information about using Duolingo: https://support.duolingo.com/hc/en-us/sections/200829784-Using-Duolingo.