Peace be on all.
1= To believe a religion , first one has to believe in a perfect God Who guides.
Those who have doubt, they can always ask and pray to Allah what is reality of Ahmadis, since their claim is no small; that the Promised Reformer (as told by Islam and other major religions) to serve Allah, Holy Prophet (s.a.w.) and Islam has come.....Many have done such prayers and have been guided by the grace of God. [I have people in my family and outside who were guided by God clearly]......... My late (Marhoom) father was shown in dream in the time (and presence in dream of) of second Ahmadiyya Khalifah, who would be third and fourth Khalifah. In his dream, fifth Khalifah was shown as young boy but he did not know him........ Years latter it happened so. All Praises to Allah.
2= In 1908, when Hazrat Promised Messiah Mahdi (a.s.) passed away, his pious followers, Ahmadiyya Muslims were around 300,000 and they were present mainly in India.
3= In 2015, Ahmadiyya Muslim Community has progressed under the Fifth Khilafat of Hazrat Promised Messiah Mahdi (a.s.) by the grace of Allah the Exalted and it has reached in
207 countries of the world officially.
4= Allah does not let flourish a fasle which uses claim of fake revelation:
About Holy Prophet (s.a.w.) it was said as argumentative standard:
[69:45] And if he had forged
and attributed any sayings to Us,
[69:46] We would surely have seized him by the right hand,
[69:48] And not one of you could have held
Us off from him.
The following is the English rendering book of divine revelations, dreams and visions vouchsafed to Ahmadiyya Promised Messiah Mahdi (a.s.) It is not equal to or alternative of Holy Quran, these are revelations of Allah to him over the years till his last, to guide him how to understand Quran and Islam and then guide the world.
https://www.alislam.org/library/books/Tadhkirah.pdf