East London to Sussex commute by train

Hello friends,
I currently hold offer letters from two universities, one in London and the other in Sussex. As my wife is living in London, I have to manage accommodation in London. I would like to know if it is possible to commute from East London to university of Sussex 2-3 days a week to attend classes. As a foreign national, I don't have much ideas about the train system and fare. Any help would be appreciated.

Cheers!

Honestly not that bad. I live in Brighton and Hove so quite close to Sussex and I go to a London uni. I travel to uni by train and I assume our journeys will be similar. Since u will only have to travel 2 or 3 days it's not bad at all. I would say 2-2.5 hours there and 2-2.5 hours back roughly. Depending on the uni prestige of the London uni u might find Sussex to be a better idea. At the end of the day which uni looks better on paper to an employer. Also, it's just an underground or railway (overground) trip to a London main railway station I.e. London Victoria or London bridges. Then from there to Sussex area is most likely gonna be 1 train or 2 max. There after u may need to walk or bus it