practice more and find your own way and approach how to deal question. you can find your approach once you practise around 50-80 question each day. practice will increase your speed and things will look simple
it depends on how well you are dedicated to CAT. classes only complete the portion but ultimately it's you who has to do the final preparations. start from the beginning and cover as much as you can.
I believe one could start preparing for cat without any Classes....just be serious and focused....invest time proportionally well in all the three sections in a defined manner..work 1-2 hours everyday ...