If you had a not so pleasant experience on 0.5g of mushrooms, 1g+ very likely WILL make things worse, and beer will not protect you from this. As an alternative I humbly suggest you start off with a VERY small dose of LSD (1/4 tab or less) instead, and do that same amount several times just to acclimate yourself to the psychedelic space. Dose only once, and advance no more than 1/4 tab in any subsequent session. Mind that smoking weed is a frequent cause of bad trips because it greatly intensifies the trip. There is always a risk.
Best wishes now and always.