I fully understand that this may be the case, but you do need to realise that you’re dealing with a complex technical subject that is also the subject of a lot of misinformation and quite frankly outlandish claims. If you want to discuss it with any credibility you do need to make sure you know what you’re talking about and that your facts are straight. Incoherent, ignorant or demonstrably false claims will just undermine your credibility in the eyes of anyone who checks you out, or is otherwise confronted with evidence that contradicts you.
Unfortunately, this does take time and effort. If you aren’t able to find the time to study a relevant science subject (preferably to unviersity degree level at least), it’s probably best to just admit that you don’t know what you don’t know and stick to discussing what you do. There’s no condemnation in not having all the answers – remember 1 Corinthians 13:12: “For now we see only a reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known.” Your personal testimony – what God has done in your own life and how you know the saving power of Christ on the Cross for yourself – will speak far more to people than anything you have to say about the age of the earth or evolution.