Update Polkadot Technical Fellowship details

docs/learn/learn-polkadot-opengov.md

@@ -546,7 +546,7 @@ For a step-by-step outline of how to delegate voting power in Polkadot OpenGov,
 [Delegating Voting Power](../maintain/maintain-guides-polkadot-opengov.md#delegating-voting-power)
 section on the [Polkadot OpenGov Maintenance](../maintain/maintain-guides-polkadot-opengov.md) page.
 
-## The Technical Fellowship
+## The Polkadot Technical Fellowship
 
 :::info From Technical Committee to the Technical Fellowship
 
@@ -575,6 +575,15 @@ stakeholder voting for a proposed referendum. Members of the Fellowship can vote
 Fellowship proposal and the aggregated opinion of the members (weighted by their rank) constitutes
 the Fellowship's considered opinion.
 
+The Polkadot Technical Fellowship resides on the
+[Collectives](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fpolkadot-collectives-rpc.polkadot.io#/fellowship/referenda)
+parachain and maintains the [Polkadot Fellows](https://github.com/polkadot-fellows) repository. The
+fellowship also has its own governance model with multiple tracks with approval and support
+parameters, where the votes are weighted by the rank of the member.  
+The fellowship governance is primarily used for its membership management,
+[approving RFCs](https://github.com/polkadot-fellows/RFCs) and whitelisting Polkadot OpenGov
+proposals.
+
 {{ kusama: <Fellowship network="kusama" defaultValue="Loading Kusama Fellows..."/> :kusama }}
 
 ### Ranking System
@@ -634,12 +643,28 @@ For more information about how to submit a whitelisted proposal see the
 
 :::
 
-### Becoming a Fellowship Member
+### Becoming a Polkadot Technical Fellowship Member
+
+Currently, the only way to become a fellowship member is through a referenda. An existing member can
+submit a referendum with the preimage of a batch call that has `fellowshipCollective.addMember` and
+`fellowshipCollective.promoteMember` on "2/Proficients" track. On Polkadot-JS UI for Polkadot
+Collectives, navigate to Governance > Fellowship > Referenda and click on "Add Preimage".
+
+![fellowship-add-promote-member-preimage](../assets/fellowship-add-member-preimage.png)
+
+After the preimage is successfully noted, navigate to Governance > Fellowship > Referenda and click
+on "Submit Proposal" (This button is active on the UI only if you have an account that belongs to
+the Fellowship). Choose the appropriate track and the origin, and enter the preimage hash of the
+batch call that adds and promotes the member.
+
+![fellowship-add-promote-member-proposal](../assets/fellowship-add-member-proposal.png)
 
-Currently, the only way to become a fellowship member is through an existing member who submits a
-`fellowshipCollective.addMember` extrinsic. See more information on
-[this Kusama SubSquare discussion](https://kusama.subsquare.io/post/6), which points to
-[these guidelines](https://docs.google.com/document/d/1nHa-7Na4u52CTZzq87HaKNptGjyQDWm9H7s7GRjJpMU/edit).
+After the referendum is successfully executed, the member is added to the fellowship with "rank 1".
+For example, check the [Referenda 23](https://collectives.subsquare.io/fellowship/referenda/23) on
+the Collectives parachain. If a member has to be added and promoted to “rank 5”, the proposal has to
+be submitted through track “6/Senior Experts” (Always a track with a rank higher). For example,
+check the [Referenda 25](https://collectives.subsquare.io/fellowship/referenda/25) on the
+Collectives parachain.
 
 Future plans include that public members can apply to become a Fellowship candidate by placing a
 small deposit (which will be returned once they become members). Their candidacy will go through a