well good luck saving ur self and emigrating.
saving up naira is not gonna work well as inflation in nigeria is high. inflation is there an indirect tax funding rich politicians, keeping the poor from saving up and remaining in the poverty cycle.

additionally besides the inter-tribal racism you find in nigeria, nigerian economy has been disadvantaged by european colonial times, and neo colonism by companies bribing politicians to exploid resources or china giving loans in exchange to access to resources... nigeria would do better if there was a proper government since nigeria is blessed by resources.... it would be beneficial for nigerians to refuse to use their savings to fund government through inflation by not using naira but instead crypto currency, just like venezuelans did....

if u want to emigrate to a "white" country then u have, without money, very little options due to tight visa regulations.... nigeria is though a former brittish colony, which might have some ways of immigrating to UK, and germany passed the "fachkräfteeinwanderungsgesetz" whcih means if u find work and u are learning german you can get a work visa... meaning in the first 6 months i think you would have to reach B1 german... germany has some work it fails to get filled, and you can learn this work by taking an "ausbildung", which means apprenticeship.... for example there is a shortage of nurses and helpers for elderly.... apprenticeships are often not covered by minimum wage laws so u would likely have a rough time the first few years (typically 3 years apprenticeship).

considering those few german words i threw at you, keep in mind its a very hard language. if u dont take an ausbildung or go to uni there are chances you might become exploited like for jobs like harvest helper or meat factory line worker, which takes underpaid foreign workers and crams them into bad shared housing facilities, sometimes even removing their passports so they cannot escape (human trafficing). europes exploitation of harvest helpers is bad, and is reason why europe can export their aggricultural products cheap enough to be cheaper than local african products, often using the help of african harvest helpers....

theres a guy in my village though who married a young girl from nigeria. she helps him now take care of his shop. that would be another option to get to a "white country"