Phil, best advice is for you to stay as you are for the next month or two. Get your Protank and you can interchange the Evod heads you've bought for use in the Protank, as and when the Protank head/s get gunked up or you wish to change flavours. The heads are removable and can be cleaned simply by rinsing them under a running tap. You can then either wait 24hrs or so for them to naturally dry out or speed up the drying process by what is called dry-burning. Whatever you do, don't throw them away. They'll be handy for your next step into the vaping world, the 'wicking and rebuilding your own coils' step.
You have no worries with ready-made coils affecting your devices, Vamo or eGos. All that will happen is the battery life will be half an hour so more or less depending on what resistance coils you use. They they will not damage your device. Just get into the habit of checking the resistance of each coil before you use it. That's just in case you might get a dodgy one although they are not that common. Now sit back, relax and vape away.