Shri Mani,
From what you say, it is clear that you have finished doing all the parihaarams suggested for your poorva janma dosham by the josyar whom you consulted. Hence we should take it that the poorva janma dosham chapter is closed.
The girl and her family will not normally go into your horoscope and find out poorva janma dosham etc.; rather, they will look at the present picture and like to assess somewhat about the medium-term future. When I consider your/your brother's case in this way, it appears to me that your brother has worked (but is not now working) temporarily and that he does not get any heavy salary (which means to me that your brother's earnings, if any, are very low.). In today's conditions, even the poorest of the Tamil Brahmin homes will not like to give their daughter in marriage to such a boy because our community (jaathi) is suffering from a great shortage of girls. Therefore, unless you/your brother try and succeed in getting a steady and good income, either from service or from business, etc., it is not easy to get a tamil brahmin girl.
I can mention two real cases which may tell you better about the marriage situation for boys in our tamil brahmin community; if you are not a brahmin, then please skip the rest of this post.
One boy with CA qualification and very good income from his (father's) hotel business, plus his own CA practice, had to marry a girl from an extremely poor family somewhere in TN. At the time of marriage this girl looked very rustic and she did not even know rudimentary English words. Now, some years after the marriage, she looks an entirely different, fashionable, woman and is enjoying the fleet of 3 cars and all the money, income and pelf of her husband's family. One good thing we hear is that she behaves with very good respect for her in-laws although her FIL has been a reputed cook (not well educated) and her MIL is equally of low education and all the old world notions, beliefs and superstitions.
One boy with SSLC pass after many attempts and not being able to even pick up cooking from his elder brothers (who are caterers) had to earn something by being a server of food in feasts, buffet parties etc., coming to his brothers' contract as also other well-known caterers. Since a brahmin girl of any kind could not be arranged for him despite vigorous efforts by his brothers, he had to finally marry (when he was 43 years old) a girl from goldsmith caste
— arranged marriage, of course.