If you'd like to create your own schedule from scratch, this can be done within the Recurring Posts tab in the left hand menu.
Hover over the relevant day and week on your calendar and click Add New, this will bring up the options for you to add a recurring post to your schedule.
First select the Publish To dropdown and select the platform you would like your post to publish to. You can select multiple here, if you would like the same post to go out on multiple platforms.
Select the content type you would like to add to your schedule form the Choose Category dropdown
Select the day of the week you would like the post to go out on. You can select multiple days here, but one can only select one time for all posts if you do select multiple.
Select the week you would like your post to go out, i.e. the 1st, 2nd, 3rd or 4th week of the month. Again you can select more than one week here if you would like the same post type to go out multiple times in a month.
Next select the time, you can either select from one of the suggested times, or manually enter a time in the fields under Post At.
Once you're happy, click Add Post to add to your schedule. You should then see this appear in your calendar.
The calendar view is set to all platforms. To show just the posts for one platform, select from the options above the calendar.