The present internet age has brought us unprecedented accesses to information, as well as allowing many of us to be information providers, so we no longer need to rely solely on established authorities and channels (whether governments, corporations, organizations or media with their partial views). But how do we select and assess among this deluge of information, to decipher and ascertain what's beneficial and true to oneself? how do we find and cultivate our own discernment and wisdom?
There are many sites and communities devoted to sharing DIY know hows and open source software and hardware designs. You can find many interesting projects and useful resources there, you can also find and follow even more sites from there.
There is really no mystery, nor needing expensive ingredients to get good skin contacts. Remember, human body is essentially a saline bag (just water, salt, and tissues), so most saline solution or gel are all very compatible with it.