First off, starting solids is actually beginning the weaning process....just slowly. I would personally wait til 6 months if that is what you prefer (I plan to). In my experience, most 4 mo olds still have a hard time getting the eating off a spoon thing down, so I doubt that waiting 2 more months, you will all of a sudden lose your 'window'. IF you do want to start teaching your ds to eat from a spoon, maybe try a lil cereal with breakfast and that's all. That will not be enough to start bf him less and it will give him some experience with the spoon. Once you do start solids, you start at breakfast only, then add dinner. Then as they get older you start offering lunch. I would never start all 3 right in the beginning. For me personally I stay at 5 bf a day til we are eating all 3 meals on a regular basis. Then I drop to 4. I personally stay at 3-4 bf a day til my babies turn a year, then I replace 1 with whole milk, then the next week, replace a second with milk as well. I bf past the year mark, so I keep the wake up feed and bedtime feed as long as I want and am ready to wean.
If I were you honestly, I'd go to 3 hour/5 bf a day and see if you can't get a full night's sleep. My 3.5 ds has been on that since 3 months and he easily goes 10-11 hours at night just fine. If he seems hungrier during the day, we might do 6 feeds. I just would rather fill him up during the day than get up at night.
HTH some!!! And good luck.....just go with your mommy instinct. :wink: