Potty training

Br
My daughter will be 2 1/2 on June 3rd and we started potty training last night (by her choice) but the downside is she will not tell me when she has to go! She has went on the potty now once and has had 2 accidents. And both accidents were within 10 mins of one another. And i put her on the potty before she had the first one and after both accidents.