Learn Italian: A furia di studiare, assimilare nuovi concetti diventerà facile. - From studying so much, assimilating new concepts will become easy.

A furia di translates to 'by dint of' or 'from [doing something] so much'. It introduces an implicit causal clause, meaning it explains the cause of something through a repeated or continuous action. Yes, you can absolutely swap it with a forza di studiare here; the two expressions are perfectly interchangeable.

Why does the main verb diventerà use the third-person singular when it is right next to the plural nuovi concetti?

The subject of diventerà is not the plural noun concetti, but the infinitive verb assimilare. When a verb acts as the subject of a sentence in Italian (like 'assimilating' does in the English translation), it always takes a third-person singular conjugation.

Wait, doesn't an implicit clause require the main clause to have the same subject? Who is the subject here?

That is a very sharp observation! Normally, if you use an implicit clause like a furia di studiare, the person doing the studying must be the grammatical subject of the main clause. However, this sentence is a general, impersonal statement. The logical agent doing the studying is a general 'anyone', and that same 'anyone' will find it easy to assimilate concepts. Because the whole thought is impersonal, this structure is perfectly acceptable here.

Why is the adjective placed before the noun in nuovi concetti rather than after?