Should you stand or sit for chazarat hashatz and keriat hatorah?
Sit for Kriat Hatorah, stand for Chazarat Hashatz if it’s not diffucult.
If the tzibbur sits first both, or stands for both, should I do what everyone else is doing?
The general rule is, it doesn’t matter what everyone else is doing.
In specific circumstances there may be reason to avoid Machloket or whatever.
לא תתגודדו- לא תעשו אגודות אגודות
This doesn’t violate לא תתגודדו.
(When discussing with the Rabbi, he said requires it’s own לא תתגודדו Chelek of SHulchan Aruch!)
What does that mean?
It means it’s very nuanced and requires Da’at Torah and a lot of Shikul Hada’at to make the decision what is and isn’t a problem.
Thank you