Just make sure you have reference and that you persevere, the only way to get better at this is practice, perhaps avoid tutorials and just look at examples of other peoples work, you kind of need to develop your own technique when hand painting. More specific critique - again, look at reference, cracks in stone are usually…
Cool stuff you got here! But in my opinion, to really bring it to life, you should add patches of random dirt and dust in between panels. For example, the stone tile floor looks good but could use some variance like cracks or dirt for the parts in between each stone tile. Keep it up :)
Hey guys, thanks for the crits! @Noss: for the grass you're right, unfortunately I can't edit this anymore cause I merged everything together in the end :) but I'll keep in mind the direction for the next time I will paint grass. For the stones I think that in your example everything is a bit oversaturated and with extreme…