Always willing to share - most importantly enjoy the ride and support the wife! You get to experience one of life’s mysteries up close and it’s something to behold.  
Last tip - pick your stroller first then infant carrier and car seat base. Sometimes they can be incompatible or require an adaptor. We found the best bang for the buck was Graco. 
Supper last tip - your stacking will slow but that is ok. Your priorities will change and that’s a good thing. Excited for you and the family!