So I recently got into beyblade burst, I've invested in the lost longinus, drain fafnir, and kreis Satan beys. 
The assistance I need is in purchasing launchers that won't cause my fingers to bleed, or grips for the launchers that came with Satan and fafnir. The string launcher that came with longinus feels comfortable, but it lacks the power I want. If anyone could direct me I'd be very thankful.

I'm already considering getting both a sword launcher and a light launcher with long winder and a grip, but they won't cover my need for a left spin launcher, as far as I know.

Try hasbro the TT then when u get a decent combo enter a tournament

So I recently got into beyblade burst, I've invested in the lost longinus, drain fafnir, and kreis Satan beys. 
The assistance I need is in purchasing launchers that won't cause my fingers to bleed, or grips for the launchers that came with Satan and fafnir. The string launcher that came with longinus feels comfortable, but it lacks the power I want. If anyone could direct me I'd be very thankful.

I'm already considering getting both a sword launcher and a light launcher with long winder and a grip, but they won't cover my need for a left spin launcher, as far as I know.

I will give you links to some gear that will help you
https://www.amazon.com/dp/B06ZZQYMCS/ref...HDEOQT9SVB

https://www.amazon.com/gp/product/B01N2U...QGBNROG443

https://www.amazon.com/gp/product/B01E4W...AL3X6WRYZY