Without any doubt you will get Darshan of God, if you don't doubt about the existence of God. Its not an easy task but remember to see God is not a small thing. - By Aditya Kaviraj
Its is not only necessary to increase Tapobal, but your devotion towards the Lord should be Adig.
Not giving up on everything also ensures Darshan as many Sanyasis and Vairagis don't get Darshan of God, but doing great penance can ensure Darshan. There are many examples of this, which, I, have listed below.
Meerabai from Chittorgarh, Rajasthan was a great Krishna devotee and the Lord was always by her side. Narsimehta was also a great devotee and lord was always there for him.
Samadhi Vaishya and king Surath got Darshan of Durga Maa both of them were not great devotees from the beginning but due to their problems the took shelter in the Goddess and moreover, I am not insulting anyone but Yog Sadhana is not as important as the intensity of Nam Japa and the time you devote to knowing the Lord.
Arjun was not a great Tapasvi or a Mahayogi but he saw the Vishwaswaroop of the Lord having unlimited Tej because he was fully devoted to the Lord so the Lord gave him Divya Drishti. Hence, just like Arjun, if you become fully devoted and are sincere towards the Bhakti Marg you will also be able to develop Divya Drishti through which you can see God.
Prahlad and Dhruv were only kids when they saw God and not Mahayogis but due to the pure Bhakti of innocence they were able to get the Darshan of God.
In this Kaliyug no one can give 20 hours or more to Bhakti or Tapasya. Another thing is that Kaliyug is also a Yug and God is impartial, hence, just as the other 3 Yugas were auspicious for Bhakti so is the Kaliyug. The only difference is that there were more devotees and Bhakti Bhav was more, good Karmas and Punya was at its peak in those Yugas, this started declining from the end of the Satyuga and is still declining and will continue to decline.
In this Kaliyug it is more easy as compared to other Yugas to get Darshan. A learned man may know or not know about God. In this Kaliyug people have no time for God and also life span of people is very less as compared to other Yugas.
So, no one can do 1000 years Tapasya but one can do great Bhakti. Another most important thing is that God is having the Tej of Millions of Suns but still you can see God.
In this era everyone wants their problems solved and so they do different Prayogs and Sadhanas, but remember one thing that if you are on the Bhakti Marg you will gradually get all what you want and will develop Siddhis and Divyadrishti.
Gradually all your problems will be solved without asking, I didn't wanna say that any information provided is wrong but this is a fact.
Om Namah Shivay