You have rightly identified your investment goals which are aligned with retirement. The risk-profile which you have identified as aggressive is the one which you have perceived by yourself and it can differ from actual result. Therefore, it is imperative to do proper risk-profiling before making any investment decision to suit your needs. As you have identified the amount and duration to invest on a monthly basis, it is recommended to invest via SIP mode being a new investor.
Further, the retirement goal of ₹2 crores is achievable on ₹40,000 monthly SIP considering that you have investment duration of 15-23 years, and assuming 12-15% annual returns.
The recommended schemes are Axis Bluechip Fund (30%), DSP Midcap Fund (25%), Canara Robeco Equity Diversified Fund (25%), and SBI Small Cap Fund (20%).