To use Olib, you simply need to register a standard Z-Library account through one of its working mirrors first.
A "LibGen+" clone that works well, though it may contain ads. Libgen.st: Listed as a trusted, working mirror. Specialized Text Alternatives genlibrusec alternative
The next generation of alternatives will not be centralized websites. Watch: To use Olib, you simply need to register
If you want to avoid shadow libraries entirely, several massive institutional repositories offer free, legal access to high-quality reading material. Primary Content Legal Digital Library To use Olib
If you’re using GenLib RusEC primarily for journal articles, is the more focused (and still legally contested) alternative. It covers 85%+ of all paywalled academic papers.