OP congrats on your baby boy
I love having two sons, especially after feeling disappointment at both their 20 week scans - I thought I wanted daughters! Now they are 14 and 16 and an absolute joy most of the time.
I read Raising Boys when DS1 was tiny. Lots of guff, as said, but the stuff I took away from it was about the importance of loads of male role models, especially as I would be the main carer ( DH works away for 3-4 days at a time so I gave up work) All through primary school particularly, I was aware of the many many women who were part of their lives and did a mostly excellent job WRT formal education, swimming lessons, nurturing, kindness, etc. And I looked for local activities that happened to be run by men (football, tennis) so that they would get a balanced input. And encouraged male friends to do stuff with them, which made them all happy.
They seem pretty well-adjusted now. Both very stereotypically "masculine", as is their dad, but both understand sexism, respect and about the fight for equity for the sexes. They claim not to have seen any porn (!) but say their friends have and we've talked about it not being like real life. I am pretty open about female biological stuff, which doesn't even make them squirm any more, and they know they can ask me about anything at all to do with their bodies, etc. They are not interested in girls yet - or boys - and each has a close circle of decent male friends. I do badger them about stuff that's going on in their lives, get them to talk to me about friendship groups, their mates who are dating, what they do in PHSE classes, etc. And sometimes one of them will open up about an issue that's been causing them worry for a few days, and we sort it out. I'd much rather be that annoying nosy mum than the one who doesn't get involved, because I know they'll talk to me when the worst happens, and we'll be able to work through it together. I also totally respect their privacy and confidentiality. They both still love a cuddle or some one to one cosy time together so I must have done something right 