JPen, Pips on BH, playing a short time, $10.00 rubbers.....those are a lot of interesting decisions all at once.
Why JPen? Why a rubber on the BH with a blade where the handle locks you in to only use one side? Why a rubber on the BH that is usually not recommended until you have good strokes for ALL strokes. Like, for someone planning to turn pro, usually it is recommended to NOT use pips until you reach a very high level so that you can do all strokes with smooth before you develop the pips technique.
If you are training JPen and want to become a pro, usually penhold, regardless of CPen or JPen, it takes a minimum of 4 years longer to get to the same level because Penhold requires certain subtle technical skills. And it is much easier to switch from Penhold to Shakehand than it is to switch from Shakehand to Penhold. This is because Penhold is harder to learn.
In China, Japan and Korea, 35 years ago, over 90% were Penhold. Today, those numbers have switched. Why would so many top players from countries that used to specialize in Penhold now be dominated by Shakehand players?
And given the rise of the reverse penhold backhand, and how that makes it more possible for Penhold players to have some ability to compete with Shakehand players, why would you choose to use a handle that makes RPB exponentially harder to use?
In the end, if you are having fun, I will just wish you luck. But a lot of this does not seem to be well planned, thought out, sorted out.