Afrikaans is a recent descendent from the Dutch language (or a Dutch creole depending on who you ask). The language came into being after Dutch settlers settled the cape of South Africa. The language probably starting growing distinct from Dutch sometime around the 17th century.
Afrikaans is the 3rd most spoken language in South Africa, with over 13% of the population speaking the language. 10% of the population of Namibia also speak Afrikaans natively. There the language is also largely known as a second language and used as a lingua franca.
The vast majority of the Afrikaans vocabulary is taken from Dutch. However there are enough differences between the two languages grammatically that they are considered distinct.
Dutch and Afrikaans are moderately mutually intelligible. If you speak one you won't know the other right off the back, but there will be a lot of similarities. When the languages are written out versus spoken their mutual intelligibility goes up.
Afrikaans and Dutch both fall into the West Germanic language family, alongside English and German. Linguistically this means that you're likely to find more similarity between English and Afrikaans than you are with English other languages outside of the West Germanic family.
Afrikaans is often cited as one of the easiest foreign languages for native English speakers to learn. This is because of its linguistic closeness to English and its relatively simple grammar system.
Afrikaans isn't the most popular foreign language, but there is at least one notable option:
From $4+ per month
15+ minutes a day
Afrikaanspod101 features audio lessons in a podcast format. Lessons are great for grammar and vocabulary. Each lesson is designed around an Afriakaans conversation between native speakers, and the teachers do a great job of keeping things engaging.
The site features transcripts, an in-site flashcard system, and many other useful features.
Afrikaans is a fascinating language with an equally interesting history. If you've never learned a foreign language before it's definitely good language to get your feet wet!
I'm definitely an unlikely language learner. I failed Spanish in high school. I started learning German as a hobby while studying abroad. Long story short...and a couple languages later...I love language learning!