Sorry! First thing you need to file taxes for last 3 years. So you don’t have any income to sponsor your wife; you gotta make At least 30-35K since you have a baby too. I’m not sure if you are a millionaire here. USCIS is very tight in income lately to make sure we not burden to the system.
1.Approve I-130- you have issues with income/financial burden proof
2. Yes! I hope it is in English
3.you need to file taxes no matter how much you make, foreign work, bank account and so on need to be disclosed.