There's advantages and drawbacks in either way. I "DIY'd" Europe partially on my own last time. I had an organized tour by means of Russia, but did England, Amsterdam and on a daily basis journey to Paris alone, with some assistance from the working day tours company (Viator). I think https://paxtonimmml.blogthisbiz.com/41841823/the-basic-principles-of-guided-tours-vs-diy-exploring