First IVF cycle

Me and my bf have been referred for IVF after spending 6 weeks consulting at a fertility clinic. We have the funding approved. We only get 1 cycle on the NHS where we live. My partner has a very low sperm count, and we will probably have to do ICSI. We have been told we will probably never conceive naturally so my consultant was eager to push IVF asap. I have PCOS but it doesn't affect my ovulation. I'm broken by the fact that we might never have the big family we have always hoped for. We have been trying to conceive for 3 and a half years and it's been a long tough journey. I'm scared and anxious about the time ahead. I am desperate for real life experiences and advice as we have no idea what's ahead of us. Anybody going through anything similar that I can relate to please as nobody I know around me seems to understand fully.