any runners out there?

Alyssa • 30 FTM to beautiful baby girl !
okay, so i want to run a half marathon this year. for the last couple of years i've been wanting to and this year i decided i will.
BUT I have a couple of questions - 
1) is it realistic for me to train and be ready to run a half in June (june 10th or 24th)  of this year - even if i'm not a runner right now? 
2) my husband and i plan to start TTC - if i do become pregnant before the race, will I still be able to train and run the half? 
3) any tips on how to get started training? 
i've read that you should be able to run 30 mins without stopping and i can't do that.. YET 
any help would be appreciated !!