Did you use the dosdude1 tool when rebooting the system? You have to patch using macOS Mojave Patcher
Notice that you have installed the system as if it were an imac You must do it as MacBook pro 8.1
No problem you have only 384 MB of memory in HD3000, you only have 4GB of ram installed. To upload to 512 MB in HD3000, increase the RAM memory by at least 8GB