Best Travel Option for my Itinerary

This is my first trip to Japan and I'm going for 19 days (17/4/19 - 05/05/19). I'm so excited for it but really confused to choose the quickest, cheapest and easiest option for my Itinerary. I've marked below my main travel points and I've been lucky to book my hotels under 10 mins walking distance from these stations.

I know that I have to use JR for some of this travel but some stations that I'm staying near don't have JR. Also some places that I'm going to don't have JR trains the whole way

My questions are:

Should I buy a JR Pass or should I just use a Suica card as I go? or have both?
If I need to buy JR Pass should I buy 7, 14 or 21 days?
JR Passes have different regions - is there one to cover all my travel?
Do you recommend to reserve my train tickets for some of my travel?

Narita Airport to Shibuya -Shibuya Station
Shibuya Station to Fuji Q Highland
Fiji Q Highland to Kyoto - Karasuma station
Karasuma station to Hiroshima Station
Hiroshima Station to Miyajima Station
Miyajima Station to Osaka Namba Station
Osaka Namba Station to Higashi Shinjuku Station
Higashi Shinjuku Station to Narita Airport

I know this is a little complicated but hoping you can help! thank you very much

These questions are all easily answered by reading this website more thoroughly. Use the rail pass calculator in the Transport section to find out which pass you should buy.

I would recommend getting a JR pass with the amount of traveling u take.
How many days would depends on how many days u need.
Hope this helps.

I like to travel a lot. Definitely, I would like to visit Tokyo as I watch many documentary movies about this culture, nature, and nation so it is so intriguing. It is the most developed country that attracts instantly.