Hi,
You have specified a counter, the 7111HV, which is an unusual choice for the hobbyist, can I ask what you are counting and why you need high voltage ?
As for the circuit - its shown properly in the Rs datasheet - so cannot add to that.
Your switches need to be rated at mains voltage - but without knowing their method of use is hard to suggest a paticular type.
Think most folk would agree that a mains voltage project is perhaps not the best thing for a beginner to be doing - it kills too easily and you don't get many chances.