I urgently need you to check these sentences on the use of the present perfect. Thank you.

1) I’ve never messaged my friends in another country or posted a message on a message board.I have never missed meals because of the Internet and have never spent more than three hours on line.
2) I’ve sometimes visited game sites (on line) instead of studying. I’ve never spent more time in chat rooms or on game sites than (offline) with my friends.
3) I’m really/quite/not very/not interested in gossips about celebrities, music and fashion reviews, school research, software download, electronic gadgets, horoscopes.
4) I like going on (??) websites about celebrity gossips, reading music reviews, conducting school research, downloading software and buying electronic gadgets.

• Sorry, I’ve been out of touch. (Sorry, I haven’t been in touch is the same? How are things with you? Any good news?
I’ve been busy with my mum recently since she was operated on her vocal cords last month.I’m really glad she has recovered from it now.
• I’ve had a lot of school work (homework?) to catch up with since I was absent from school for a week.
• I’ve just bought a new scooter. I got it on Friday. I’ve never had one in my life and it has really changed my life for the better. I bought it at a (what do you call a shop that sells motorbikes?) on the Main Street. I’m really pleased with it.
• What have you been up to?
• I think it all my news. I can’t wait to hear your news/I’m looking forward to hearing your news/from you (How else can I end an informal letter?)

1) ... online.

2) I’ve sometimes visited online game sites instead of studying. I’ve never spent more time in chat rooms or on game sites than with my friends offline.

3) I’m really/quite/not very/not interested in gossip about celebrities, music and fashion reviews, school research, software download, electronic gadgets, or horoscopes.

4) I like going on websites about celebrity gossip, music reviews, and school research, as well as websites for downloading software and buying electronic gadgets.

• Sorry, I’ve been out of touch. (Sorry, I haven’t been in touch is the same? How are things with you? Any good news?
I’ve been busy with my mum recently since she had surgery on her vocal cords last month. I’m really glad she has recovered from it now.

• I’ve had a lot of school work to catch up with since I was absent from school for a week.

• I’ve just bought a new scooter. I got it on Friday. I’ve never had one, and it has really changed my life for the better. I bought it at a motorbike dealership on Main Street. I’m really pleased with it.

• I think this is all my news. I can’t wait to hear your news/I’m looking forward to hearing your news/from you.

I'd end with this question:
• What have you been up to?