2) As I said earlier,I go to Temple when I get time but not regularly,what are the things I can do at home or daily life otherwise when I don't find time due to my studies?
My parents are against me chanting now as they feel you should do it after you start earning.
...
Any other suggestions, I can try doing.

at least once a week You have to find time to visit the Temple dear Mataji.

Attend Kirtan, attentively listen lecture, honor prasadam and associate with Friends.

It is must! We can find time for 3 times meal, for our college, time for sleeping....is it difficult to sacrifice half day in a week for Krishna???? No!

If You pray to Krishna He will give You desire and time for visiting the Temple.

Without the association of Devotees it is impossible to achieve love for Godhead.

Impossible.

as i told in previous letter, at home You can sow Tulasi and serve to Her. Also choose the best picture of Krishna or Lord Nitay Gouranga then worship Them. Offer to Them food, sing for Them....