I learned from my mom not to be afraid to learn new things and improvise. She was a wonderful cook, and yet she still took cooking classes and tried to pick up ideas in restaurants. There is nothing she made when I was little that she made the same way by the time I went to high school.
There has been a great revival in interest in cooking and canning and the other "traditional" arts, so much so that the techniques are better than Grandma dreamed of, in terms of hygiene. Also, the available ingredients are very much different--condiments and herbs Mom knew nothing about, leaner meats, different ideas about what is healthy. Mom's flexibility has been a great asset. If you want to learn these things, there are so many books and classes to learn from. You just have to get in there and do it.
The best thing I've learned from previous generations is to have some affection for the faults and foibles in our marriage and to consider everything either of us does as a joint effort. When you're in it for the duration, that's the attitude you have to have. As one older gentleman put it: "I look in the mirror every morning and say to myself: 'Well, you're no prize, either.'" I see many couples around me. Some can cook, some can't, but even now that is how the happy and durable ones do it.
Be aware, too, that it is folly to try to "do it all." My mom and traditional aunts and great-aunts go to Costco and use some of the ready-made foods. They can't make it cheaper, and they have other things to spend their time on.
The other thing that I have learned is that the ladies in the Altar Society who keep the church clean and have the bake sales are a great group to bond with. You don't even have to have any of them as a particular confidant. It is just nice to hang with other traditional mothers, particularly when it comes to valuing what we do without taking ourselves too seriously. It's like dropping into an episode of "Lake Wobegon" sometimes--the disagreements among sweet Christian ladies over whether the gravy for the church dinner should be flour or cornstarch can take on fierce partisan proportions!--but I find that charming, too! :D So if you're going to be a traditional mom, spend some time volunteering at your parish in the other group-female activities. It's great.