My DIL bought some paper blackout pleated shades that she taped up with painter's tape to darken the nursery. They aren't so pretty (she even taped the sides and they stay up 24/7 at this point), but as a very temporary fix for you, that might work. They definitely don't let any light into the room.

My DD used Command hooks in one of her college apts to hang curtains with grommets. She was able to easily take them off the hook to since she is over 6 ft tall. They did the job.

I would use command hooks. I think they will work perfectly.

Thanks so much for the suggestions! Per usual, you guys are simply so knowledgeable. I love it.

In terms of command hooks, there are so many does anyone have a certain one I should be considering?

When we patched walls and painted our MB, we put up pleated paper blackout shades that we picked up at Home Depot. The sticky part along the top edge we affixed to inside window frame or the trim around the window opening (I forget which). If I recall, the shades came with mini clothespin type clips (or we used mini clips we had) so we could clip the shades in the open position during the day to let in light. They worked very well at blocking light and held up well while they were needed, up until our permanent window treatments were installed.

i think it would depend on if you are hanging the curtain from a rod or if it has grommets. Also, how heavy are they? This link is for a curtain rod, but weight is 5 lbs. if curtain has grommets you could do small individual hooks for each grommet. That would distribute more weight across a greater expanse. https://www.walmart.com/ip/Command-Curtain-Rod-Hooks-2-Hooks-2-Strips/932086440?wmlspartner=wlpa&selectedSellerId=0&wl13=1939&adid=22222222227294368590&wl0=&wl1=g&wl2=t&wl3=356198265973&wl4=pla-769065608550&wl5=9002572&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=local&wl12=932086440&veh=sem&gclid=CjwKCAjw-ITqBRB7EiwAZ1c5U-3yyOW9EXvaPmZHoEns9zKqUmW-kWHTJ76AzfJWUe4e_2eIGb9jAhoCTSUQAvD_BwE

Type of Command hooks depends on your rod, width of window, weight of curtain etc. Here’s one example of a way they can be used.

Just remember to let the Command hooks sit for a day before adding any weight to them.

I think my easiest solution for now is a black out paper shade. I think I will pick some up at Home Depot. I know it won't look pretty but that is fine by me. Thanks again for all of your suggestions!!!

Do you have a casing around the window? If so, this could be an easy solution. I haven't tried them myself, but they intrigue me. How to hang curtains without nail holes

Bestyears, I do not have window casing. I had seen that idea before. Would be great if I had the casing!

I am filing that away Bestyears for when my 16 yo goes to college & wants to hang curtains in her dorm! Genius!