2. How do you judge that they don’t know much about the law? Since you don’t know yourself, how can you tell if their answer is wrong?
3. Try to find a large legal consultation website for online consultation. The website will review the professional qualifications of members of the Bar. In addition, if you consult a lawyer in person, you can ask to see the lawyer's practicing license.
4. Even real lawyers are not omnipotent. There are almost no lawyers who know everything, and they always tend to be empirical in their business. In my personal opinion, it is not shameful to tell the truth to a client or introduce issues that you do not understand to other lawyers.
If you have any specific questions, you may wish to post them. It may be able to help you solve practical problems.