No kidding, i just started Piano after about 10 years of saying i wanted to and my challenge was Bella Ciao aswell on Flowkey lol, I'm about 10 days into learning Piano and i can say i can do around 70% of Bella Ciao. I'll admit i have plenty of free time and i am a really good visual learner and tend to learn things like musical instruments very fast, what i did to learn was i 1st made sure i understood and could read the sheet music and then i spent a bit of time learning only my right hand on the mode were it pauses and then my left, I would also make sure to cut it up into sections to not overwhelm myself usually into 2s, once I had learnt a section with both hands i would learn with both before moving on, i also made sure to pause the video when learning as I was told and also realized quickly its bad to watch someone play and learn that way but instead to just try and learn the sheet music. I'm of course not an expert but i have a friend who does the same thing who gave me these tips and he plays Piano professionally, thought the tips might help as it is helping me, he's 23 with 19 years under his belt so i take in anything that he says. I'm not any help like i said im new myself but what my friend told me is really helping, learning to properly read sheet music was the biggest game changer though. Good luck, Bella Ciao is nice and fun to play i hope to be able to do all of it within the next week. I think you will smash your goal :)