TTC & fertility testing

Gemma
Hi all, me and my husband have been ttc for about 11 months now. I am 25 and my oh is 29. No positives, we are starting to feel a little disheartened now and we have discussed going to the doctors for fertility test. I have no idea what to expect or the time frames on these. Could anyone shed some light? I'd like to feel semi prepared going into this. Any input is welcomed. Thanks