You are right. This will definitely not be easy to achieve. Dollar dominance will be hard to defeat if the member countries are not economically strong enough to push their agenda. One major challenge BRICS is going to face is the economic and political strength of its member countries. The economic and political strength of these member countries will determine its global acceptance and long-term adoption. If these member countries are weak, it will be difficult for them to align with the policies made and form a unified force, and this does not encourage transparency. The dollar already has a strong force backing it up; BRICS has a lot to do.
It is not easy for countries that join BRICS to achieve financial strength if they do not have the resources. The dollar dominates many sectors and perhaps their role is still quite large for now so overcoming their dominance is not something that is easy to achieve. Most countries intend to get out of the dollar’s grip but the question is whether they are able to do so because on the other hand dependence on the dollar is still very large for some countries today.
Economic strength will determine the level of success of countries that join BRICS and we can see how strong the economy is for some of the countries that join them. Moreover, if political relations are closely related to this process, the impact will certainly be much greater on the BRICS journey itself.