How to jump between Columns and Rows

Q1: Could you show me how to jump between columns (ex. from C7 jumps to F7) in a worksheet to protect the formula within that cell (D7 and E7)?

Q2: if we hit the enter key its goes down to the next row/cell, is there a ways to make it jump to the next column/cell using the enter key instead of the arrow right key?

Q3: lastly, if I reach my last cell w/c is G7 in my worksheet (ex: G7 column) is it possible to make it jump back to A8 (then to A9, A10.. and so on) ready for a new record.?

It will easier for us users to move between cells if you could help us find the the answers for our 3 questions.

Thank you.

Q1, Q3: Unlock only the cells that you want people to type data directly into, then protect the worksheet.
Q2: Tools > Options > Edit ==> Move selection after enter [your selection]...

Q2: solved
Q1 and Q3: I tried but AutoFilter doesn't work after, I had to unprotect to use autofilter.

I did some web searching and i found this code (see below), I just replaced C and D to I and J and it works perfectly! I want to include the following columns also L, M, O, Q, S and T into the code but I'm not a programmer. Please help.

thank you.

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It works for me. All columns listed are skipped.