We are observing a large sample of stars with MEGARA in GTC through a filler-type OpenTime program obtained up to now in 7 semesters. We summarize our advances done with MEGASTAR, the stellar spectral library that we are observing with GTC-MEGARA at R=20000 in two setups HR-R around Hb and HR-I around CaT. We described our project in García Vargas et al. (2020, MNRAS, 493, 871).We published our first data release in Carrasco et al. (2021, MNRAS, 501, 3568). In our third work about MEGASTAR, (Mollá et al. 2022, MNRAS, submitted) , we have determined the stellar parameters (effective temperature, surface gravity and metallicity) of a subsample of the DR1 stars with spectral types later than B2.Next works will be devoted to the second data release and to the analysis of the hot stars