How long till you felt confident on your own?

Just curious how long it was till people felt confident driving after passing? I've been driving around, passed on 5th, I've been doing long drives. I did a drive for over an hour from Dagenham to Watford, using the M25 on the 27th. I've done drives from Dagenham to Southend as well, which last about 40 ish minutes. I make sure to have 3 P plates on and a new driver warning sticker lol.

On the drive to Watford, if it was a test, I definitely would have got a dangerous fault cos I was on a roundabout and I thought I saw the driver indicate to come off the exit before me, so I decided to go, but he was still going round. Thankfully, I was quick, otherwise it could've caused an accident. On another roundabout, I accidentally was in the wrong lane, so I thought I had time to come over to the correct one, I thought no one was close in my mirrors, but my husband told me, I basically forced another car into another lane 😭 I felt so bad, I wish I could apologise to that person, they didn't even beep me, which would have definitely been justified. The nerves of doing such a long drive and being on a motorway, probably caused me to mess up, as I'm usually good at roundabouts.

So just wanted to get an idea of when people are confident enough to just do any kind of drives, long or short, or motorways etc? Of course everyone has their journey and process for this, just wanted to get an idea.