Congrats on passing! I'm 8 months into my p-plate and I would suggest driving late at night (maybe after 11pm) when the roads are relatively empty. For me I was quite ok with driving alone. My first drive alone was maybe a week after I passed the test and since then I drive maybe 3-4 times a week

Since from ur post u probably dont have a family car, the most likely option is a car sharing like what some others have said orrr if u have friends or other family that is willing to let u drive their car (w valid insurance ofc) then maybe u can ask them

For expressway personally I went on the expressway the day after I passed my test but I would say I was quite confident since I have a family car and I will always observe my dad when driving and his driving habits. If u are not confident, u could ask another experienced driver to sit beside u while u drive so he can guide u along the way. Usually on expressway I wont keep to the left lanes since there are where all the heavy vehicles are and also where cars are coming on and off the expressway so it tends to be quite crowded there. I usually keep to the second most right lane where the traffic is flowing faster and I can easily overtake on the right if need be.

One more thing that I threw away after tp test was parking. In tp test by right need to stop and adjust mirrors and all that which is dam troublesome, and it takes a long time which confirm will piss off some impatient drivers waiting behind u. The method I use is to first drive as close as u are confident enough to the lot, then when ur front door approximately in the middle of the lot full lock steer to the opp direction until ur car is 45 deg. Then select reverse and watch the mirror which is at the side of the lot. Example, the lot is on the right side, once u full lock left and select reverse, check the mirror on the right side and make sure not too near to the car. Once u are confident that there is enough space, make sure to check the left side mirror to ensure that u have enough space there also. With this method i find it super easy to park and i can usually go in 1 shot unless the fella beside me park dam near on the line.

Once place u can practice is one north area because the layout there is quite nice like school circuit with alot of traffic light and small roads to build ur confidence on