In terms of introducing a new currency, slashing 4 zeros, that is not a bad idea. Also floating both currencies at once is a good idea as well so people don't get confused and understand the difference.
Anything is possible as long as they do it gradually. To bring down inflation digitizing the currency and boosting interest rates is a good idea.The current interest rate is what 12 percent ? 15 might be good for Iran.
They have done it already. If you see recent banknotes in Iran, you'll notice that it says 10 instead of 100,000 IRR almost everywhere, except for the top-right corner where it displays 4 slashed zeroes in a lighter color.
Interest rate is 18% for loans and 16% for depositing your money in banks for long term. I think it should increase by 6 percent at least (over a span of 3 years). The problem is that if they do that, people will probably pull their money out of Tehran Stock Exchange and deposit it in banks (which is a risk-averse option) and that can make a lot of investors unhappy with the new government, particularly after the April crash. I think the central bank should prioritize controlling liquidity to bowing to public pressure or inflation will continue to remain above 20% for a long time (which will have worse side effects). If it were me, I would raise interest rates to 26% for loans and 25% for deposits over a span of 4 years.
As for the IRIAF, this could be my unpopular opinion, but I think our only viable chance of modernizing the IRIAF is to hire senior Chinese, Russian, Ukrainian, Italian and Brazilian scientists with high salaries (over $200K annually), provide them with what they need, and ask them to transfer the know-how to us; particularly in areas like metallurgy and engine design. We have maintained good relations with these countries and the people of these countries have a history of helping us in other areas.
Russia may finally deliver Su-30 or Su-35 to us, but only when it can't change the balance of power in the region significantly. So, even if the deal goes through, I wouldn't count on receiving anything game changing from Russia before 2030. By then, our major regional rivals like Israel and Saudi Arabia will be operating hundreds of F35's and tens of F22's.