Ebonite Cyclone.

Thanks for the answers... Also, I have a bit weak wrist from my injury so I am starting with 12 pound ball... How much effect will this have on my game? I did throw 14 pounds, but at 1 hour mark my wrist started to feel weak. Sadly, our pro shop (I'm in a country bowling isn't very popular sport) doesn't offer Ebonite Cyclone anymore :/.

Ben919 has given you good solid advice to start out with. Throw enough games to really get comfortable, and then the real questions will start coming.

Welcome to the sport, Vilin13!

+1.  A good fit will make all the difference in the world.

Entry level is the best way to start out.  The key is to work on the fundamentals first before even attempting to build a larger ball arsenal.  Balls to look at in the entry level would include the Columbia Freeze, Roto Grip Scream/Shout, Track 300 series, Hammer Vibe, Brunswick Karma, and Ebonite Cyclone.

Here are three good points of advice that many of us will tell you on here.  First, it's essential to find a quality pro shop.  Higher average bowlers in your center can give you good advice on this.

A good shop will take you out on the lanes to watch you bowl.  This is important because it will help with matching you better with the equipment.  If a shop does not want to take the time to have you bowl on the lanes or just want to sell you the most expensive ball possible (stuff like the Storm Sync, Defiant), go somewhere else.

Second, coaching is always good when you're getting started.  It will help you develop the fundamentals and that is key to building a solid game. 

Third, just have some fun.  Don't go in with the mindset where you have to bowl 200+ every game and overthink things.  Take things one shot at a time.  If you take it one shot at a time, combined with good coaching, and a ball with a good fit, you'll make some good strides pretty quickly.

Welcome to the sport and best of luck to you.

I have to agree with all the posts everyone above mentioned.
When I entered competitive bowling, I went and bought the highest performance ball, only to have harder time transitioning into it. Few weeks later end up buying an entry ball which helped me get more control.

If house balls are hooking too much after 2-3 games, maybe the Storm Tropical Heat would work after you Polish it, as it's hybrid coverstock, you can change the surface in many ways to see what works for you.

I think if you throw 12 lbs house ball, then 14 lbs fitted with fingertips and larger span might be comfortable, but you should see if there's other bowlers with similar hand size that are willing to let you try their ball. Having larger span and fingertips is quite different than the house balls.

Also work on spares as much as strikes, they're a big deal in competitive bowling and can boost your average. If too many 10 pins occur, it's not a bad idea investing in a spare ball like Brunswick Target Zone, it'll go pretty darn straight at the 10 pin if you aim toward it properly.