21M first solo trip. To Washington DC.

I have never been on a solo trip before but I would like to finally venture out on my own. I’ve never been to DC but it has been on my travel list for years now. I’m a huge have of American history and all things museums. I’m planning on going for a week in early October so it is not so crowded like during the summer months and that way I have enough money saved so I’m not pinching too many pennies. I will be renting a car for the week so no reliance on public transport. I am open to travel outside of DC as well if there’s any cool recommendations in Maryland or Virginia. I am planning on going to some of the big places like the Lincoln Memorial, Changing of the Guard, Library of Congress.

If there are any recommendations for places to see, or eat, or even stay at (that are somewhat budget friendly), I am open to suggestions! Or if you have any tips for first time solo travelers, I am all ears!