i transitioned about 2 years prior to starting uni then just before i started i purged and reverted back to living as male. after a while it became evident that i couldnt cope with being male and had to re grow my hair and re fill my wardrobe and so on, it took until my second year in uni to get everything together and sorted before i finally transitioned again!
i have to be honest, it was the hardest thign to walk into a lecture theatre filled with people that knew me as male before the summer and then walk into it as myself, but i was lucky, in the sense that i had been fairly open with some people and uni were really supportive of me so it has actually gone quite well.
that was 15 months ago and it all seems to be going well now, once i got over the initial fear and people realised which pronouns to use everything is great

i am not saying this would be the case for everyone, i think i am just lucky sometimes but i think there will always be some reason not to transition. some reason why it isnt the right time. but only you will know when it is the right time and only you will know when you are ready!
whenever you decide to transition, once the first bit of walking into somewhere new, or as yourself is over with, the feeling of being accepted for who you are gets so overwhelming and overrides the anxieties you had previously felt.
good luck on whatever you decide to do

Sarah