Should I make the first year choice? benefits vs drawbacks? Are dual status aliens eligible for standard deduction?

Hello community members, I recently moved to US on H1B visa along with my spouse & kids (H4 visa) on same date 09-Oct-2021 and will be staying here for some years. I have to file my first time returns. I have few queries.
1. I believe I am considered as a non-resident alien as I have not passed by SPT. In this case, I believe I have to file 1040NR and cannot do "married filing jointly". Is this correct?

2. Lets say I'm opting for First year choice and doing a "married filing jointly", can i get standard deductions?

3. If 2 is no, then what is the use of opting "First year choice" as it doesn't give any benefit when compared to 1 (filing as a non-resident alien filing single).