This sounds like an awful lot, doesn't it! A good set of preschool worksheets should cover all of this, and more. In the preschool years, repetition is the key to learning, but you should look for worksheets that teach the same skills in a variety of ways. This not only prevents boredom setting in, but also reinforces the concepts by encouraging understanding as well. The importance of reading to your child cannot be emphasised enough, and you should encourage them to 'read' as much as possible too.
A step-by-step set of preschool worksheets will introduce new challenges to your child - skills and concepts they have not yet learnt. With your support and encouragement, your child will learn these new skills, achieve their goals, and gain confidence that will be vital when they start kindergarten or school. Starting 'big school' brings a lot of changes into a child's life, and your child needs to believe that he or she can face new challenges and cope well.
Ideally, children who have been introduced to reading modeling behavior enter kindergarten and first grade ready and eager to read on their own. For most children, the formal teaching of reading begins in these grades. Most educators, homeschool or otherwise, use a combination of phonics programs, worksheets, and actual books to teach reading. These are all tried and true methods and can result in reading success. A relatively new methodology, syllabics, extends the focus of phonics programs on the sounds associated with the consonant letters to simple rules for correctly using the variable sounds associated with the vowels.
Just because your child will be playing fun online games doesn't mean the same value won't be there. Create a comfortable study zone. Turn off outside distractions such as cell phones, radios or TVs.