Newbie, first post. Preparing for a Mavic 2 Pro retirement gift from my staff. Yoo hoo! I have 2 acres outside my door (north of West Palm Beach FL) that begs for beginner flights no more than 50' max just to learn the controls. Just around the yard which is surrounded by tall trees. After reviewing the sectional to find out what I can and can't do I am lost. It appears that I can't do as my yard seems to be inside Class E sfc so not even minimum altitude practice. I see a note saying to check the NOTAM/Supplemental info for the effective hours at "Gwynn" which SEEMS to be the airport affecting me but I'll be darn if I can find anything. See attached JPG of the sectional with an arrow to my house. Can someone help me sort out what I am looking at? Trying to make sure I follow the law so I don't end up playing cards with Paul Manafort for 5 years. Any comments/help appreciated!