I honestly just need advice

My husband is 28, I am 24. We have been trying to conceive for about 18 months now. I have a child from a previous relationship so I know I’m able to have kids I guess? Just wondering what I should do as in steps to get fertility testing for husband and I suppose myself. I have recently moved so I need to find an obgyn soon anyways and I’m wondering if they will jump in to helping with fertile issues right away. Also I’m thinking of just buying a lab kit online for husbands sperm to be sent off and analyzed before seeing a doctor. I’m thinking this might be cheaper, thoughts?