Engaged in april need advice

Hello everyone! I have a few questions and need some friendly advice on what to do and how to go about marriage. We got engaged in april and have been together for 6 years and lived togethee for 2. Unfortunately we live with my grandparents and want to get our own house before we get married. I am a sophomore in college and will be done with credentials and all in 2 1/2ish years. How do we go about the process of buying our own home and also planning to save up for a wedding thats going to be around 15,000 anyone else having this problem