1) Go for the Ryzen 2600X for 3d modelling. It saves you a lot of money, with very close performance for 3d modelling if not better.
The Ryzen does not come with inbuilt graphics.
Try this(You can add additional hardware if you want):
https://pcpartpicker.com/list/YhcNjy
2) Go for i3 8th gen for normal usage. It's more than enough as the i3 8th gen has same cores and processing power as i5 7th gen.
Try this:
https://pcpartpicker.com/list/Lrbc7W
Some parts maynot available in India. Fell free to change the cases, add HDDs. In case of PSU, just ask if it isn't available in Indian sites.