Krallu
It is not just flying IMC but doing anything new on your own which gets the nerves going but which gives the greatest satisfaction when you achieve it.
Having an instructor in the right seat gives a security that if all goes wrong he will sort it.
On your own if all goes wrong there is only you to sort it.
I can remember soon after getting my PPL many moons ago flying longer trips with a more experienced PPL friend.
I was happy in the local area on my own.
We planned a trip taking two non flying friends to france for the day. I drove to the airport excited at the prospect and met the two non pilot passengers.
My experienced PPL friend had not yet arrived so i busied myself preparing the aircraft.
Then came the call! My PPL friend had crashed his car on the way to the airport. He was fine but would not be able to come. he happily told me to go on my own as I was perfectly capable.
Without him my confidence went and I nearly cancelled. My non pilot passengers pleaded with me to go and in the end I said ok. It was the best thing I had done as the successful trip lifted my confidence no end while to have backed out would have ruined it.
Moral to this is there are times when we have to fly the nest on our own without the watchful eye of Mother bird.
Start flying IMC on your own or with a less experienced PPL so that you can build the confidence in yourself doing what you have been taught to do.
Fly in conditions where you can get out if you have to ie high cloudbases or broken cloud or through thin cloud. Then work up as you become more confident.
Pace