I would say the best app/platform to contact me initially is LinkedIn to allow me to verify you; and mean a connection must be established, as we can then communicate via email afterwards. As before I just got a bunch of spam/scam emails meaning I couldn't taking them seriously and so if we can talk via LinkedIn messaging, communication can be trusted, safer and effective :)
Another way to contact me is this form, were I can look to respond to you when I can, as I look to ask for your necessary contact details and context/information with what you would want my help with. This is a great direct way to contact me, to where I can get a good understanding of what work we can do together and I can reach out to you.