What will happen is they will bring you wheelchair, take you through security and to the lounge. They will leave you there and pick you up when it’s time. Don’t be afraid to remind lounge staff you are waiting if you think they are cutting it to fine.

you will be taken to gate and will be first to board the crew will help with bag just ask.
when you get to destination they normally like assistance passengers to wait while every one else deplanes. I prefer to get off and stand out the way and wait for wheelchair if it’s not at jetty.
they will pick you up take you through passport etc and take you to where you need to go car park, taxi etc.