I can't say anything about driving on the left side since I never had to do it.
About the clutch, I think it depends on whether you used to do it a lot. I used to drive stick when I learned to drive, but for the last 5 years I have only driven automatic or electric. But when I rented a car with manual transmission, my muscle memory came back within a few minutes and everything went fine.
I just managed to set up a C++ project with CMake for the first time.
I have several years of experience with Java, Python and a bit of Rust... For the last 2 weeks I started to learn a bit of C++. The language itself is not really the problem so far, but the ecosystem around it is quite frustrating to me.
Because I like opening my calendar in the evening, this is now the second time your posts have spoiled my surprise. Looks like I have to start opening my calendar in the morning.
I work in academia... There is no free coffee here.