I offer a lot of content for free.
Free Whatsapp channel, where I share tips and links for learning Czech language: https://chat.whatsapp.com/BnWsrubNEwOHIqhxkIvLah?s=cl&p=i&ilr=1
Free email newsletter: https://ivanamertova.clipsan.com/cs/csfrm/1555615ca5
My youtube channel – a lot of videos. I recomend my grammar playlists: numbers, time, pronouns, adjectives, verbs, questions for A2 exam, nouns and also huge playlist with Czech vocabulary.
Facebook: https://www.facebook.com/profile.php?id=61554146350101
Instagram: https://www.instagram.com/cestinasivanou
Tiktok: https://www.tiktok.com/@ucitsecesky
Free ebooks:
Czech in the Street – wordlist of those words that people often use but they are bad and no textbook mention them. You should not use them but you definitely need to understand them.
I have also infochannel on WhatsApp, you can join here: https://whatsapp.com/channel/0029Vb7MHKGC6ZvdzR20MM0r