My advice would be to go for it!
unless you think you are really pushing yourself which would be silly, but if you are serious about wanting to be able to do this you have plenty of time to mentaly prepare yourself.
I was at a high anxiety point in May and i had a holiday booked i was really nervous before flying but reminding myself of the reality of the situation which is the fact flying is the safest method of transport ever! how often do u hear of a plane crash? once in a which and put that against the amout of flights that fly every day all around the world! there are hundreds!
If its the being away from home part that worries you it helps me to remind myself the one good thing about busy places is that if you were to fall ill there are plenty of people around to help you, in reality your safer than being at home alone
Best of luck!