Go in Technic Launcher log in with ur Minecraft Account and then go to Modpacks and search The Splash. Press Install and after Play. To make it run better press Launcher Options and then press Java Settings and where is Memory there put it how much ram to work better. If u have only 1 to 4GB rams and u have 32GB or something then it means that u have 32 - bit java u might install the 64 - bit one, if u have the operating system 32 - bit then rip. Hope i helped you. Btw all the modpacks will have the amout of rams u selected in Java Settings when u open them.