I'm not a computer wizard either- it's been ages since I uploaded to YouTube- so- I'm afraid I wouldn't be able to walk you through it personally... but- there are so many tutorials on YouTube itself that will guide you step by step. Just enter your question in the search bar there and you can bet some kind sole has made a tutorial on it. Honestly- I've learnt so much from YouTube- not just computet stuff- how to fix things in the house too.
This is an older video but, as an example- see the link below. I imagine you will need to create an account on whatever site you choose to use- but, that will likely be straight forward. Likely even more straight forward than joining here even.