So you found a fascinating rune formula or a rune stave somewhere on the internet and want to use it.
First of all, you dont know what is the actual intent of the author of the stave. It can be malicious.
Second, even if the stave is true to its name and description, in that case too it can be dangerous for you.
Use a divination method that you are competent in to check wether this stave will be safe for you. Verify the short and long term effects of the stave and the energy usage. Only in case of acceptable effects activate the stave.
If after reading these instruction you are still not sure what to do, dont do it, it is dangerous for you. First learn a divination method and become competent in it. Otherwise you are risking too much.
I have encountered many stories of inexperienced and very enthusiastic people using rune magick, those after their working needed professional help, got entity attachments, demonic posessions, health problems and so on.
These are not toys, these things can cripple your life.