Basque morphology is more regular than Latin one. Basque is an agglutinative language more than a flexive one even if there are so many suffixes, so you don't really have to learn many declensions, just how suffixes are added to words ending in a consonant, to words ending in a vowel and to words ending in -a, that is just three particular possibilities. Anyway there are some "cases" with specific forms used with nouns referring to human beings. There is no agreement in the noun phrase (adjectives and nouns don't agree in number or case in the noun phrase), only the last word in the noun phrase carries the number and case suffix. Moreover there are no grammatical genders as in Latin. The Basque verb system is in some respects more complex and in others more simple than the Latin one. Most verbs are conjugated with the help of an auxiliary verb except a couple of irregular verbs, so if you learn the conjugation of the auxiliary you can conjugate most verbs (while in Latin you have to memorise the perfect root and the supine root of many verbs). The complexity of Basque verbs lies in the fact that every verb agrees in person and number with the subject and the objects if there are any (both the direct object and the indirect object) and you have to memorise all the combinations and use them fluently (verb forms with a subject and a direct object are nork-nor forms, forms with a subject and an indirect object are nor-nori forms and forms with a subject, a direct object and an indirect object are nork-nor-nori forms).

El euskera es un idioma dificil de aprender. No conozco el latín, no te sabria decir.

El euskera es muy dificil para aprender incluso para los españoles porque no es una lengua románica, es decir, no proviene del latín y por tanto no tiene ninguna similitud con lenguas como el castellano, catalán, italiano, etc.

There are no "easy" or "difficult" languages. A language is easier if it's close to your own language and it's difficult if it's very different from your own language. Basque happen to be very different in every respect from most languages of Europe (even though it's not so "strange" if you compare it to languages in the world in general), actually its grammar has many aspects which are the opposite of what's found in Spanish, so it's very difficult for Spanish speakers. A Japanese speaker might find the word order and the order of the constituents in the sentence similar to what's found in Basque, but he would find Basque verbs and the ergative structure quite complex and unfamiliar. A Chinese speaker might find it even more unfamiliar.