1) Does change in my wage to Level 2 helps in getting my petition approved?
There is no way to change the LCA to Level 2 while the case is pending or in an RFE Stage. Your employer must file a new Petition.
2) I have the original visa papers of initial(which got expired on Jan 31st, 2018). But I don't have the receipt number of newly applied cap-exempt. Can I search for opportunities outside my company? If yes, suggest me how.
You may search for opportunities with another Employer as you do not need a copy of the new receipt to obtain an H1B from a different employer, you may use a copy of the previous approval notice or a copy of the visa. For more information, please read the Article below.
If you are looking for an opportunity and an H1B Visa Transfer, please send resume at firstname.lastname@example.org - We will be more than happy to assist you in finding a suitable opportunity and an H1B transfer. Thank you!