Trying to have a baby??

My boyfriend and I have decided to try for our first baby ever! I have spyla a birth control just like mirena but smaller because my uterus is smaller. I get my birth control out the 27th of May does anyone know how long after that can I conceive? This is going to be an amazing expirence I just wanna do it right so any advice and health tips to make me more fertile would be appreciated ???