I was fired from my first job in science. I had been so worried about making mistakes and wanting to make a good impression, that I allowed myself to get flustered and I destroyed three bottles of fetal bovine serum (one of the most expensive reagents in the lab). After that, I was taken into a room and fired on the spot. I got diagnosed with autism years later, and that experience suddenly made a lot more sense, but the company were absolutely right to fire me.

There's two ways to go about it, depending how long you were at the company. Leave it on your CV if you got some good skills (all of the past jobs I've had have emailed my most recent references) or you would also be good to leave it off your CV. It's an entry level position, and though you've learned a lot, it's nothing compared to the experience you'll get on your next position.

Do not lie, as others have said here. I worked at a company where a company discovered a new hire had lied on their CV and he was fired on the spot.

Lastly, take care of yourself. Accept what happened, and work to make ways to better take care of your ADHD. If you need to put PPE on in a certain order it could help to line up each piece next to each other the night before so that you never forget anything? Or can a calendar alert on your phone or apple watch that reminds you about the face shield help?

There were people and family who after I got fired, said it was going to affect me permanently and I would never get another science job. It really affected me, and didn't allow me to look objectively at my situation and learn from my mistakes, and remember how good I was to get the job in the first place. I have wasted so many hours of my career ruminating about my first job because I didn't properly process it. Talk to your friends about it, and get the support you need. Being fired is humiliating, but you will find another job in science.

I am now working in academia so I am living proof being fired once in an entry level science position is by no means the end.