
I don't know if this could help or not; but, could you try training him to be quiet and/or alone in 'baby steps'? Perhaps if you treat it as a new game, trick or whatever but especially as a super new thing to do with lots of praise etc, he may start to respond. It is better, I think, if you choose one small goal to achieve and ignore all else - it could totally drive you mad otherwise. Perhaps, keep him on the lead for a few moments when you get back from your walk. Mybe think of your attitude too. Are you thinking 'I've just taken you out so can't you be quiet for a little while?' or 'I've got to ; get tea ready; pick the kids up; do the washing ..some such [been there done that]
I also know, through children and dogs and cats and students and rabbits and partners and horses and family .. that it can be so much easier to deal with situations as they arise, rather than planning ahead and choosing which behaviours to deal with; but planning and dealing with one small issue at a time can really work and it won't be long before you're seeing a real difference in all your interactions. For the significant other [in this case your dog] even negative attention is a reward - they love you to bits and so want your attention - no matter what form it takes. Don't forget some 'me time' too. We often get so bogged down with looking after all our commitments that we forget ourselves and this can lead to frustration and, eventually, inability to cope with all the demands on us,; mentally, physically and emotionally.