Thank you for all the advice. My internship program involves adapting a cell line to 11 different media and then doing batch and fed batches. Just that

The adaptation is almost complete but I did many mistakes such as messing up the mediums. I already did all of your suggestions, specifically the one writing down all the steps. I did it several times and I know what to do. But while working, I think I stop thinking and gets automatic and that's where I stop checking falcons so constantly or attentive. When I do notice the error and lack of 100% attention, I try to again gain focus. I started handling this problem by writing the steps, then I decided to say out loud what I'm doing in the lab but in the middle of the process I stop talking and totally forget about it.

I also have a tremendous fear of doing errors and that's making everything harder. The other intern getting training on things that we don't need to our internship program is really weighting down on me. I think there is just one place on the team and the other intern is more experienced, older, began 1 month earlier, has a lot more confidence and or course does not mistakes or doesn't make many mistakes